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Alexander Blockx
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Alexander Blockx
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Alexander Blockx (born 8 April 2005) is a Belgian professional tennis player. He has a career-high ATP singles ranking of world No. 95, achieved on 12 January 2026 and a best doubles ranking of No. 467, reached on 10 November 2025.[2] He is currently the No. 3 singles player from Belgium.[3]

Key Information

Blockx won the boys' singles title at the 2023 Australian Open.[4] He represents Belgium at the Davis Cup.

Early life

[edit]

Blockx was born in Antwerp, Belgium, to a Ukrainian family background. He started taking tennis lessons in his early childhood with Philippe Cassiers.[1][5][6]

Junior career

[edit]

Blockx had notable results on ITF junior circuit, maintaining a 108–48 singles win-loss record.[citation needed] In 2022, he reached the third round and then quarterfinals of major jr. events of that season, at Wimbledon and the US Open.[7]

The following year, Blockx reached the final at the 2023 Australian Open in both the boys' singles[8][9] and doubles categories. Partnering with Brazilian João Fonseca, he was the runner-up in doubles, defeated by Learner Tien and Cooper Williams.[10] Blockx gained revenge over Tien by winning the boys' singles final in three sets. Although Gilles-Arnaud Bailly reached two major jr. finals in 2022, the last Belgian boy to lift a title at this level, prior to Blockx, was Kimmer Coppejans at the 2012 French Open.[11]

As a result, he reached an ITF junior combined ranking of world No. 1 on 1 May 2023.[12]

Professional career

[edit]

2022: First ATP Tour matches

[edit]

Blockx made his ATP Tour qualifying debut at his national tournament, the 2022 European Open in his home town, Antwerp, where he was given a wildcard. He lost to Swiss Dominic Stricker in straight sets.[13] He was also given a wildcard into the main draw of the doubles, playing alongside Ruben Bemelmans in what proved to be Bemelmans' last professional match.[14]

2023: More ATP matches, top 500 debut

[edit]

In March 2023, Blockx made his Masters 1000 qualifications debut after receiving a wildcard for the 2023 Miami Open where he lost to Yosuke Watanuki.[15][16]

Blockx received a wildcard for the qualifying competition at the Antwerp Open and qualified into the main draw on his ATP singles debut.[17] In his very first ATP Tour singles main draw match ever in his hometown, he lost to fifth seed Yannick Hanfmann in two close sets.[18] Just a week after his first appearance in the ATP circuit, he won his first ITF title in Glasgow. And a week later, he remained unbeatable, he won his second title in Sunderland.[19] Partly due to his first qualification for an ATP tournament and winning two ITF titles, he entered the top 500 for the first time in his career on 6 November 2023.[20]

2024: Maiden Challenger title, top 250

[edit]

Blockx received a wildcard for the qualifying competition at the 2024 Australian Open. He also received a qualifying wildcard for the 2024 Miami Open but lost to Pedro Martinez in the first round. He reached a new career high ranking in the top 300 of No. 294 on 18 March 2024.[20] In November, Blockx won his maiden Challenger title in Kobe, Japan defeating Jurij Rodionov in the final. He became the third youngest Belgian champion in Challenger history (after Libor Pimek and Olivier Rochus). En route to the title, he defeated for the first time a top 100 and home player Taro Daniel. As a result, he rose to No. 205 on 18 November 2024, which gave him a direct entry to the Grand Slam qualifying rounds.[21]

2025: First win, top 110

[edit]

In January, Blockx won his second Challenger title in Oeiras, Portugal defeating Liam Draxl in the final. He became the youngest Belgian to earn multiple trophies at that level. As a result, he entered the top 150 in the singles rankings on 27 January 2025.[22][23] Blockx made his Masters main draw debut at the 2025 Miami Open as a qualifier but lost to Corentin Moutet.[24]

In July, Blockx reached his third Challenger final at the Winnipeg Challenger, losing to Liam Draxl in the final.[25][26] Blockx entered his second Masters 1000 main draw as a qualifier at the National Bank Open in Toronto.[27] Ranked at a career-high of world No. 119, achieved on 4 August 2025, Blockx also qualified for the main draw at the Cincinnati Open, where he recorded his first ATP Tour win by defeating Marcos Giron.[28] The result solidified Blockx fifth position in the NextGen Live Race to Jeddah.[29] Blockx won his second Challenger of the 2025 season at the 2025 Slovak Open, and moved to fourth in the NextGen race.[30][31] At the 2025 Moselle Open, Blockx received an entry through the Next Gen Accelerator programme and recorded his second tour-level win, defeating qualifier Francesco Passaro. As a result he moved up to world No. 101 in the singles rankings on 10 November 2025,[32][33]

2026: Masters debut, top 100

[edit]

In January, Blockx won the title at the Canberra Challenger 125. He entered the top 100 as a result[34]

Blockx made his major debut at the Australian Open as a lucky loser, following the withdrawal of Arthur Cazaux. He lost in the first round to Jaime Faria in four sets.[35]

Personal life

[edit]

Blockx' parents were both professional athletes: His father, Oleg, was a track athlete in hurdle races and his mother, Natalia, was a swimmer.[citation needed]

Since 2022, Blockx partly trains at the Topsportcentrum Tennis Vlaanderen in Antwerp and Cassiers' Forest Hills Tennis Academy.[36]

Performance timeline

[edit]
Key
W  F  SF QF #R RR Q# DNQ A NH
(W) winner; (F) finalist; (SF) semifinalist; (QF) quarterfinalist; (#R) rounds 4, 3, 2, 1; (RR) round-robin stage; (Q#) qualification round; (DNQ) did not qualify; (A) absent; (NH) not held; (SR) strike rate (events won / competed); (W–L) win–loss record.
To avoid confusion and double counting, these charts are updated at the conclusion of a tournament or when the player's participation has ended.

Singles

[edit]
Tournament 2023 2024 2025 2026 SR W–L Win %
Grand Slam tournaments
Australian Open A Q1 Q1 1R 0 / 1 0–1 0%
French Open A A Q1 0 / 0 0–0  – 
Wimbledon A A Q3 0 / 0 0–0  – 
US Open A A Q2 0 / 0 0–0  – 
Win–loss 0–0 0–0 0–0 0–1 0 / 1 0–1 0%
Masters tournaments
Indian Wells A A A 0 / 0 0–0  – 
Miami Q1 Q1 1R 0 / 1 0–1 0%
Monte-Carlo Masters A A A 0 / 0 0–0  – 
Madrid Open A A A 0 / 0 0–0  – 
Italian Open A A A 0 / 0 0–0  – 
Canadian Open A A 1R 0 / 1 0–1 0%
Cincinnati Masters A A 2R 0 / 1 1–1 50%
Shanghai Masters A A A 0 / 0 0–0  – 
Paris Masters A A A 0 / 0 0–0  – 
Win–loss 0–0 0–0 1–3 0–0 0 / 3 1–3 25%

ATP Next Generation finals

[edit]

Singles: 1 (runner-up)

[edit]
Result    Date    Tournament Surface Opponent Score
Loss Dec 2025 Next Generation ATP Finals, Saudi Arabia Hard (i) United States Learner Tien 3–4(4–7), 2–4, 1–4

ATP Challenger Tour finals

[edit]

Singles: 5 (4 titles, 1 runner-up)

[edit]
Legend
ATP Challenger Tour (4–1)
Finals by surface
Hard (4–1)
Clay (–)
Result W–L    Date    Tournament Tier Surface Opponent Score
Win 1–0 Nov 2024 Kobe Challenger, Japan Challenger Hard (i) Austria Jurij Rodionov 6–3, 6–1
Win 2–0 Jan 2025 Oeiras Indoors III, Portugal Challenger Hard (i) Canada Liam Draxl 7–5, 6–1
Loss 2–1 Jul 2025 Winnipeg Challenger, Canada Challenger Hard Canada Liam Draxl 6–1, 3–6, 4–6
Win 3–1 Oct 2025 Slovak Open, Slovakia Challenger Hard (i) France Titouan Droguet 6–4, 6–3
Win 4–1 Jan 2026 Canberra Tennis International, Australia Challenger Hard Spain Rafael Jódar 6–4, 6–4

Doubles: 1 (runner-up)

[edit]
Legend
ATP Challenger Tour (0–1)
Result W–L    Date    Tournament Tier Surface Partner Opponents Score
Loss 0–1 Feb 2025 Open Pau–Pyrénées, France Challenger Hard (i) Belgium Raphaël Collignon Germany Jakob Schnaitter
Germany Mark Wallner 		4–6, 7–6(7–5), [8–10]

ITF World Tennis Tour finals

[edit]

Singles: 4 (2 titles, 2 runner-ups)

[edit]
Legend
ITF WTT (2–2)
Finals by surface
Hard (2–2)
Clay (–)
Result W–L    Date    Tournament Tier Surface Opponent Score
Loss 0–1 Mar 2023 M15 Sharm El Sheikh, Egypt WTT Hard Georgia (country) Saba Purtseladze 3–6, 4–6
Loss 0–2 Sep 2023 M25 Falun, Sweden WTT Hard (i) Belgium Tibo Colson 5–7, 6–4, 3–6
Win 1–2 Oct 2023 M25 Glasgow, UK WTT Hard (i) United Kingdom Anton Matusevich 5–7, 6–4, 6–2
Win 2–2 Nov 2023 M25 Sunderland, UK WTT Hard (i) Belgium Tibo Colson 4–6, 6–2, 6–4

Doubles: 1 (runner-up)

[edit]
Legend
ITF WTT (0–1)
Result W–L    Date    Tournament Tier Surface Partner Opponents Score
Loss 0–1 Jun 2023 M25 Arlon, Belgium WTT Clay Belgium Alessio Basile Brazil Gabriel Roveri Sidney
Ukraine Vladyslav Orlov 		6–0, 5–7, [5–10]

Junior Grand Slam finals

[edit]

Singles: 1 (title)

[edit]
Result Year Tournament Surface Opponent Score
Win 2023 Australian Open Hard United States Learner Tien 6–1, 2–6, 7–6(11–9)

Doubles: 1 (runner-up)

[edit]
Result Year Tournament Surface Partner Opponents Score
Loss 2023 Australian Open Hard Brazil João Fonseca United States Learner Tien
United States Cooper Williams 		4–6, 4–6

References

[edit]
[edit]
Revisions and contributorsEdit on WikipediaRead on Wikipedia

Alexander Blockx

View on Grokipedia
from Grokipedia
Alexander Blockx (born 8 April 2005) is a Belgian professional tennis player who has achieved a career-high ATP singles ranking of world No. 101 on 10 November 2025. Standing at 6 feet 4 inches (1.93 m) tall and playing right-handed with a two-handed backhand, Blockx is coached by Philippe Cassiers and hails from Antwerp, Belgium. He turned professional following a distinguished junior career, during which he won the 2023 Australian Open boys' singles title by defeating Learner Tien 6-1, 2-6, 7-6(9) in the final, becoming the first Belgian to claim the AO junior boys' crown. Blockx also reached the boys' doubles final at the same tournament alongside João Fonseca and ascended to the world No. 1 ITF junior ranking in singles and doubles on 1 May 2023. On the professional circuit, Blockx has secured two ITF Men's World Tennis Tour singles titles in 2023—at the M25 events in and —marking his entry into the ATP rankings' top 500 that year. In 2025, he claimed his maiden ATP Challenger Tour title at the Oeiras Open, defeating 7-5, 6-1 in the final. He won a second Challenger title at the Slovak Open in , defeating 6-4, 6-3 in the final on 2 November, which propelled him to a new career-high ranking. Combined with his two ITF titles, this brought his total professional singles titles to four. As of November 2025, Blockx's career stands at $505,713. His rapid rise from junior stardom to Challenger success positions him as an emerging talent on the .

Personal background

Early life and family

Alexander Blockx was born on April 8, 2005, in , . He holds and has resided in throughout his upbringing. Blockx was born to Ukrainian parents who were both accomplished athletes: his father, Oleg Blockx, specialized in hurdle races as a track athlete, while his mother, Natalia Blockx, competed as a professional swimmer. Their backgrounds as elite competitors fostered an athletic environment in the household, emphasizing discipline and physical training from an early age. Physically, Blockx stands at 193 cm (6 ft 4 in) tall and is naturally right-handed, traits evident during his youth that contributed to his imposing presence in sports.

Tennis development

Blockx began his tennis journey at the age of four, inspired by watching his older brother Maxime's lessons at a local club. His family's athletic background, with parents who were competitive track and athletes, provided early motivation for and in sports. He started formal training under coach Philippe Cassiers at the CAS Tennis Academy, located at TC 't Sas in Lier near , where Cassiers immediately recognized his natural talent during an impromptu session. Cassiers, who founded the academy in 2005, played a pivotal role in building Blockx's foundational skills, emphasizing technique, consistency, and a love for the game over a 16-year . This early environment focused on developing core abilities through regular practice and play, fostering Blockx's initial passion for . As Blockx progressed, he transitioned to the Topsportcentrum Tennis Vlaanderen in , , around 2022 for more advanced development, continuing under Cassiers' guidance while benefiting from the facility's structured programs for junior athletes. This move allowed for intensified training tailored to higher-level demands, including physical conditioning and tactical refinement. Blockx also gained early exposure to Belgium's competitive junior circuits, participating in local events that honed his competitive instincts without formal international pressure.

Career

Junior career

Alexander Blockx began his career with notable progress in 2022, reaching the round of 16 at the Wimbledon boys' singles event after defeating Phoenix Weir and Ignacio Buse, before falling to sixth seed 6-7(5), 6-2, 6-0 in the third round. Later that year, he advanced further at the US Open, securing a spot in the quarterfinals by winning his first three matches, only to be eliminated by Martin Landaluce 6-1, 3-6, 6-2. These performances helped elevate his ITF junior ranking to year-end No. 13 in combined singles and doubles. Blockx's breakthrough came in 2023 at the Australian Open, where he claimed the boys' singles title as the No. 3 seed, defeating in a three-set final 6-1, 2-6, 7-6(9) to become the first Belgian to win the event. In the doubles competition, partnering with João Fonseca, he reached the final but lost to Tien and 6-4, 6-4. These results marked his only Grand Slam appearance that year, as he transitioned toward professional tournaments. His early training at the Topsportcentrum in provided essential preparation for these achievements. On May 1, 2023, Blockx ascended to the world No. 1 ranking in both junior singles and doubles, a career-high position he held following his successes and prior junior titles. Over his junior career, he compiled a strong Grand Slam record, reaching at least the quarterfinals in three of four appearances while securing one singles title and one doubles final. This phase concluded his age-eligible junior play, paving the way for his professional debut later that year.

2022: Professional debut

Blockx made his ATP Tour qualifying debut at the 2022 European Open in , , in October, where he received a wildcard into the singles qualifying draw but lost in the first round to , 6–4, 6–4. Following this, Blockx entered the ITF World Tennis Tour circuits, competing primarily in M15 and M25 events in and . His initial professional matches included first-round losses at the M25 and M15 in June, though he advanced to the second round at the latter by defeating Loïc Herman before falling to Cristian Cretu. In August, he reached the second round at the M15 , beating Gaël Revelli prior to a defeat against Tyler Kodat, but exited in the first round at the M25 against Harold Casanova. Later in December, Blockx played two M15 events in , each time progressing to the second round with wins over Luca Tomasetto and Loïc Andriamasilalao, only to lose to Samir and Raphaël Bertrand, respectively. Throughout 2022, Blockx balanced his emerging professional commitments with remaining junior obligations, including notable quarterfinal appearances in junior events that highlighted his concurrent development. By the end of the year, his professional singles ranking stood at No. 1548, reflecting limited points accumulation from these early outings.

2023: junior champion and early professional results

Blockx capped his junior career in spectacular fashion at the , where he clinched the boys' singles title on January 28 by defeating of the 6–1, 2–6, 7–6(9) in the final. In the boys' doubles event, partnering with João Fonseca of , he reached the final but fell to Tien and 6–4, 6–4. This Grand Slam triumph elevated Blockx to the world No. 1 junior ranking later in the year. Transitioning to the professional circuit, Blockx made his ATP main draw debut at the European Open in in October 2023, entering via a wildcard after qualifying through the draw. He faced Germany's in the first round and lost 6–4, 3–6, 3–6 in a competitive match. Blockx's professional momentum built through the ITF World Tennis Tour, where he reached two singles finals as runner-up: at the M15 in March, losing to Saba Purtseladze of Georgia, and at the M25 in in October, falling to Tibo Colson of . In November, he secured his first two ITF singles titles, winning the M25 on hard courts by defeating Holmgren of in the final, followed a week later by the M25 Sunderland 2, where he beat of . These victories propelled him into the ATP top 500 for the first time, reaching No. 475 on November 6, 2023.

2024: Maiden Challenger title

In 2024, Alexander Blockx continued his transition from ITF Futures success to the ATP Challenger Tour, achieving consistent results at the round of 16 or better in several events, which marked his growing competitiveness at this level. Early in the year, he reached the quarterfinals at the Challenger on indoor hard courts, defeating in the round of 16 (7-6(3), 3-6, 6-4) and in the quarterfinals (6-3, 7-6(5)). Similarly, at the Challenger, also on indoor hard, Blockx advanced to the round of 16 by upsetting former top-20 player Benoit Paire in the round of 32 (6-4, 4-6, 6-4) before falling to (6-7(5), 3-6). These performances helped build his ranking momentum, with Blockx entering the top 300 by March. Mid-season, Blockx maintained this form on outdoor hard courts, reaching the round of 16 at the Open by defeating Maks Kasnikowski in the round of 32 (6-7(4), 6-3, 6-4), though he lost to Ugo Blanchet in the next round (4-6, 6-7(5)). He made limited appearances on the main , primarily in qualifying rounds such as at the BNP Paribas Open in Indian Wells, where he focused on accumulating Challenger points rather than risking early main-draw exposure. In November, Blockx advanced to the quarterfinals at the Challenger, defeating Shunsuke Nakagawa 6-2, 6-3 in the first round and Yasutaka Uchiyama 4-3 RET. in the second round, before losing to 7-6(5), 6-2 in the quarterfinals. Blockx's season culminated at the Challenger in late November, where he captured his maiden ATP Challenger Tour title on outdoor hard courts. Seeded sixth, he navigated the draw convincingly, defeating in the round of 16 (7-6(3), 6-4), in the quarterfinals (6-4, 7-6(4)), and an opponent in the semifinals to reach his first Challenger final. In the championship match, Blockx dominated 6-3, 6-1, securing 100 ranking points and earning $13,180 in prize money. This victory propelled him into the ATP top 250 for the first time, reaching a career-high of No. 205 on November 18, 2024.

2025: Challenger successes and ATP breakthroughs

Blockx began the 2025 season strongly by capturing his second ATP Challenger title at the Oeiras Open in January, defeating qualifier 7-5, 6-1 in the final to secure the hard-court crown and propel himself into the top 150 of the ATP singles rankings for the first time. This victory built on the momentum from his maiden Challenger triumph in the previous year, marking him as one of the tour's emerging talents. He followed with a quarterfinal appearance at the Challenger in February, where he fell to home favorite 7-6(4), 6-3. Throughout the spring and summer, Blockx continued his Challenger-level consistency, reaching the quarterfinals at the Advantage Cars Open in May after defeating Hady Habib 6-4, 6-2 in the second round, and advancing to the same stage at the Mauthausen Challenger later that month with wins over Nerman Fatic and Jerome Kym. In July, he achieved a runner-up finish at the National Bank Challenger, dropping a three-set final to 1-6, 6-3, 6-4, before progressing to the semifinals at the Granby Challenger the following week, where Draxl again prevailed 6-4, 7-6(5). These results contributed to an overall 2025 record of 40 wins and 25 losses across all levels, including a run to the second round of US Open qualifying in August, where he lost to . Blockx made his ATP Masters 1000 main draw debut at the Miami Open in March, qualifying for the event but falling in the first round to Corentin Moutet. He followed with first-round exits at the Mutua Open against Borna Coric and at the National Bank Open in against Dalibor Svrcina, before achieving his breakthrough on the at the Western & Southern Open in in August. There, as a qualifier, he earned his maiden main draw victory by upsetting 6-2, 3-6, 6-3 in the first round, though he was defeated by in the second. Earlier in February, Blockx represented in qualifiers, losing to Cristian Garin 7-6(6), 6-1 in a against . Capping a breakthrough year, Blockx won his third Challenger title at the Slovak Open in in November, overcoming 6-4, 6-3 in the final to climb to a career-high No. 101 in the on November 10. This marked his entry into the top 100, following an earlier debut in the top 150 at No. 146 after Oeiras and a peak of No. 119 by August 4 amid his summer surge. Following the Slovak Open, Blockx competed at the in Metz, defeating 3-6, 6-3, 6-4 in the first round before losing to Clément Tabur 6-7(4), 7-6(6), 7-6(6) in the second round on November 2. As of November 15, 2025, his 2025 win-loss record across all levels stands at 42-27.

Playing style and equipment

Technique and strengths

Alexander Blockx is a right-handed player who employs a two-handed , leveraging his 193 cm (6 ft. 4 in.) to power an aggressive baseline game characterized by dictating rallies from the back of the . His physical stature contributes to effective production, particularly with a solid that allows him to transition defense into attack during extended exchanges. Blockx's serve stands out as his primary weapon, described by the player himself as "pretty good" and enabling him to generate significant pace, with a career average of 4.5 per match across professional events. This has led to high ace counts relative to his experience level, supporting an 82% service game win rate in ATP events. In self-assessment, Blockx identifies as an capable of both defending and attacking, with no single shot dominating but a versatile technique that includes reliable groundstrokes for maintaining rally control. His physical conditioning, rooted in an athletic family heritage—his father a track hurdler and mother a professional swimmer—enhances endurance for prolonged matches, allowing sustained performance in demanding conditions. Under the long-term guidance of coach Philippe Cassiers, who has shaped his development since age four, Blockx continues to refine his net play, building on a junior foundation to add more volley aggression to his baseline-oriented style.

Equipment

Alexander Blockx utilizes the T-Fight 300S as his primary racket, a model customized with 12 grams of added weight for enhanced stability and power. The frame, weighing 312 grams unstrung with a balance point of 31.7 cm, is strung with Black Code 1.28 mm strings in a hybrid setup. He maintains tension at approximately 55 pounds (25 kg mains / 24 kg crosses), a preference that emphasizes control on his serve while accommodating varying court conditions. This setup supports his aggressive baseline game without sacrificing maneuverability. Blockx's equipment has evolved significantly since joining at age 9, progressing from junior-specific frames to professional-oriented models like the T-Fight series upon turning pro in 2022. This partnership has guided adjustments in weight, balance, and stringing to match his physical development and playing demands from junior dominance to ATP Challenger successes. His racket choice complements his 6-foot-4-inch frame, aiding in generating leverage for powerful groundstrokes.

Performance timelines

Singles

Blockx turned professional in but did not enter any ATP or Challenger singles events that year. In 2023, his professional singles debut came in the qualifying draw at the Australian Open, where he lost in the first round. He entered no main draw events at ATP or Challenger level. His year-end ranking reached the top 500. Blockx's 2024 season featured his maiden Challenger title and first ATP main draw appearances, primarily in the 1R at select 250-level events, with a year-end ranking in the top 250. The 2025 season marked breakthroughs, including multiple Challenger titles, a Masters 1000 debut with a 2R at , and 1R/2R results at ATP 250 events such as the Libema Open and . His year-end ranking peaked in the top 120.
YearGrand Slams (best result)Masters 1000 (best result)ATP 500/250 (best result)Challengers (titles/best)
2022DNPDNPDNPDNP (0 titles)
2023Q1 (AO)DNPDNPDid not enter (0 titles)
2024Q1 (AO)DNP1R (various 250s)1 title (maiden in )
2025Q3 (Wimbledon)2R ()2R (Libema Open, )2 titles (Oeiras, )

Doubles

Blockx has maintained limited involvement in professional doubles throughout his career, prioritizing his singles development while occasionally partnering with fellow . His highest doubles ranking reached No. 469 on , 2025. He has one Challenger doubles final appearance as runner-up and one ITF doubles final as runner-up, reflecting selective participation with modest results. In 2025, Blockx partnered with Tibo Colson in several events, including a qualifying win to enter the main draw at the US Open, where they advanced to the quarterfinals before losing to the fourth-seeded pair of and . Their collaboration also yielded a quarterfinal run at the ATP 250 in . The following table summarizes Blockx's key doubles results from 2022 to 2025:
YearTournamentLevelPartnerRoundOpponentsScore
2022European Open, AntwerpATP 250Niels BemelmansRound of 16/Jan Zielinski0–6, 2–6
2022M15 ITFGilles BaillyQuarterfinalBorna Babic/Luca Freund3–6, 5–7
2023M15 LouleITFTibo ColsonQuarterfinal Holmgren/Jakob Schnaitter6–7(5), 4–6
2023M25 Santa Margherita di PulaITFGilles BasileFinal (RU)Matias Orlov/Luca Roveri0–6, 7–5, [5–10]
2024European Open, AntwerpATP 250 CollignonRound of 16/Mate Pavic6–7(3), 4–6
2025Oeiras Open 7Challenger CollignonRound of 16Matej Sabanov/Luka Sabanov0–6, 4–6
2025Pau ChallengerChallenger CollignonFinal (RU)Jakob Schnaitter/Markus Wallner6–4, 6–7(5), [8–10]
2025US Open, New YorkGrand SlamTibo ColsonQuarterfinal/2–6, 6–7(2)
2025European Open, BrusselsATP 250Tibo ColsonQuarterfinal/2–6, 6–7(2)

Professional finals

ATP Challenger Tour singles

Blockx has contested four ATP Challenger Tour singles finals as of November 2025, securing three titles and finishing as runner-up once. His maiden Challenger title came at the 2024 Challenger on hard courts, where he defeated 6–3, 6–1 in the final. In January 2025, Blockx won his second title at the Oeiras Open 3 (Challenger 100) on indoor hard courts, overcoming 7–5, 6–1. He reached his first Challenger final loss in July 2025 at the Winnipeg National Bank Challenger on hard courts, falling to 6–1, 3–6, 4–6. Blockx claimed his third title in November 2025 at the Slovak Open in on indoor hard courts, beating 6–4, 6–3.

ITF World Tennis Tour singles

Blockx reached four finals on the ITF World Tennis Tour in singles during 2023, securing two titles and finishing as runner-up on two occasions. These results marked his emergence as a player following his junior success at the Australian Open earlier that year. His first final came at the M15 in in March, where he lost to Saba Purtseladze in straight sets, 3-6, 4-6. Blockx had qualified for the main draw and defeated higher-ranked players en route, but fell short in the match against the Georgian qualifier. In September, Blockx advanced to the final of the M25 in , again facing Tibo Colson of . Colson prevailed 7-5, 6-4, 6-3 after a competitive three-set encounter on indoor hard courts. This runner-up finish highlighted Blockx's growing consistency on the tour. Blockx claimed his maiden ITF title at the M25 Glasgow in the United Kingdom in late , defeating local player Anton Matusevich 5-7, 6-4, 6-2 in the final. The victory, played indoors on hard courts, came after Blockx overcame four British opponents, boosting his significantly. He followed this with a second title at the M25 in the United Kingdom two weeks later, edging Colson in a rematch 4-6, 6-2, 6-4. This win on indoor hard courts solidified Blockx's strong end to the year on the ITF circuit and paved the way for his transition to higher-level Challenger events.

Doubles finals

Blockx has competed in two professional doubles finals across the ITF World Tennis Tour and ATP Challenger Tour, finishing as runner-up in both without securing a title. In June 2023, at the M25 event on clay in , Blockx partnered with Italian Alessio Basile and reached the final, where they lost to Vladyslav Orlov and Sidney Gabriel Roveri of and , respectively, 0–6, 7–5, 5–10. Blockx's sole ATP Challenger doubles final came in February 2025 at the Teréga Open Pau–Pyrénées on indoor hard courts in , teaming with Belgian compatriot . The pair fell to Germans Jakob Schnaitter and Mark Wallner in a three-set match, 4–6, 7–6(5), 8–10.
YearTournamentSurfacePartnerOpponentsScoreOutcome
2023M25 (ITF)ClayAlessio Basile (ITA)Vladyslav Orlov (UKR) / Sidney Gabriel Roveri (BRA)0–6, 7–5, 5–10Runner-up
2025Pau Challenger (ATP)Hard (i) (BEL)Jakob Schnaitter (GER) / Mark Wallner (GER)4–6, 7–6(5), 8–10Runner-up
His career-high doubles ranking is world No. 469, achieved on 3 November 2025.

Junior achievements

Grand Slam finals

Blockx has reached one Grand Slam final in junior singles, securing the title at the by defeating of the 6–1, 2–6, 7–6(9). This victory marked the first time a Belgian player won the boys' singles crown at the tournament. In junior doubles, Blockx appeared in one Grand Slam final at the , partnering with João Fonseca of , but they fell to Learner Tien and Cooper Williams of the 4–6, 4–6. As of November 2025, Blockx has not reached any finals in senior Grand Slam events.
OutcomeNo.YearChampionshipSurfaceOpponentScore
Winner1.2023Australian OpenHardLearner Tien6–1, 2–6, 7–6(9)
OutcomeNo.YearChampionshipSurfacePartnerOpponentsScore
Runner-up1.2023Australian OpenHardJoão Fonseca
4–6, 4–6

Rankings

Alexander Blockx's junior career featured a rapid rise in the ITF World Tennis Tour Junior Rankings. He entered the top 10 of the combined junior rankings in late 2022, improving from outside the top 20 earlier in the year to reach as high as No. 4 by , securing a year-end position of No. 13. Blockx sustained his strong form into 2023, winning the boys' singles title in January while ranked No. 10. This success propelled him to the world No. 1 ranking in junior singles and doubles on May 1, 2023, following additional victories in junior events. His attainment of junior No. 1 status marked the pinnacle of his junior achievements and eased his transition to professional later in 2023.

References

  1. https://www.atptour.com/en/players/alexander-blockx/b0pg/overview
  2. https://www.espn.com/tennis/story/_/id/35542364/alexander-blockx-alina-korneeva-win-australian-open-junior-titles
  3. https://www.itftennis.com/en/players/alexander-blockx/800493534/bel/jt/S/overview/
  4. https://ausopen.com/articles/news/juniors-wrap-korneeva-wins-marathon-blockx-stacks
  5. https://www.tennisexplorer.com/player/blockx/
  6. https://www.atptour.com/en/news/blockx-draxl-oeiras-challenger-2025-final
  7. https://www.tennis.com/news/articles/young-and-the-restless-former-junior-champs-alexander-blockx-and-rafael-jodar-take-atp-challenger-titles
  8. https://www.espn.com/tennis/player/_/id/11757/alexander-blockx
  9. https://www.atptour.com/en/news/blockx-saint-tropez-challenger-2024-feature
  10. https://www.castennisacademy.be/trainers/
  11. https://www.facebook.com/castennisacademy/about/
  12. https://www.castennisacademy.be/contact/
  13. https://tennisplaza.be/uniek-dubbelinterview-met-alexander-blockx-en-coach-philippe-cassiers-we-focussen-op-kwaliteitsvolle-momenten-niet-op-kwantiteit/
  14. https://www.itftennis.com/en/tournament/the-junior-championships-wimbledon/gbr/2022/j-ga-gbr-01a-2022/m-ms001/
  15. https://www.usopen.org/en_US/news/articles/2022-09-07/a_new_crop_of_belgian_youngsters_is_on_the_rise_at_the_2022_us_open.html
  16. https://www.itftennis.com/en/news-and-media/articles/blockx-beats-unbelievable-learner-to-claim-ao-boys-crown/
  17. https://www.atptour.com/en/news/blockx-challenger-2025-feature-february
  18. https://www.itftennis.com/en/players/alexander-blockx/800493534/bel/mt/s/results/
  19. https://www.tennisexplorer.com/player/blockx/?annual=2022
  20. https://www.itftennis.com/en/players/alexander-blockx/800493534/bel/jt/s/overview/
  21. https://ausopen.com/history/honour-roll/boys-singles
  22. https://www.atptour.com/en/scores/stats-centre/archive/2023/7485/ms019
  23. https://europeanopen.be/2023/10/17/thiem-wins-thriller-blockx-loses-narrowly/
  24. https://www.itftennis.com/en/news-and-media/articles/blockx-party-ao-junior-champion-claims-first-itf-pro-crown/
  25. https://www.lta.org.uk/news/ryser-and-blockx-claim-singles-titles-in-sunderland-as-brits-dominate-doubles/
  26. https://www.atptour.com/en/players/alexander-blockx/b0pg/rankings-history
  27. https://www.atptour.com/en/atp-challenger-tour/challenger-tv/challenger-tv-search-results/2024-2907-ms012-nottingham-alexander-ritschard-vs-alexander-blockx/2024/2907/all
  28. https://www.atptour.com/en/scores/stats-centre/archive/2024/7874/ms020
  29. https://www.atptour.com/en/scores/stats-centre/live/2024/9552/ms014
  30. https://www.atptour.com/en/players/alexander-blockx/b0pg/activity
  31. https://www.atptour.com/en/scores/stats-centre/archive/2024/8386/ms029
  32. http://www.tennisabstract.com/current/2024MatsuyamaChallenger.html
  33. https://www.atptour.com/en/news/blockx-rodionov-kobe-challenger-2024-final
  34. https://tennistonic.com/tour-history/atp/88766/Alexander-Blockx/Lille-Challenger/Challenger/
  35. https://www.atptour.com/en/scores/stats-centre/archive/2025/600/ms027
  36. https://tennistonic.com/tour-history/atp/88766/Alexander-Blockx/Mauthausen-Challenger/Challenger/
  37. https://www.tenniscanada.com/news/pro-tennis/2025/liam-draxl-crowned-champion-in-winnipeg-clinches-road-to-the-nbo-wild-card
  38. https://www.atptour.com/en/scores/stats-centre/live/2025/877/ms003
  39. https://tennisstats.com/players/alexander-blockx
  40. https://www.tennismajors.com/matches/atp/us-open/alexander-blockx-vs-kimmer-coppejans
  41. https://www.atptour.com/en/news/blockx-giron-cincinnati-2025-friday
  42. https://www.tennismajors.com/atp/cincinnati-masters-blockx-wins-his-first-match-on-the-atp-tour-832634.html
  43. https://www.youtube.com/watch?v=LQuc2vv0owE
  44. https://www.atptour.com/en/news/blockx-pif-atp-live-race-to-jeddah-3-november-2025
  45. https://www.atptour.com/en/news/blockx-tabur-metz-2025-saturday
  46. https://www.tennisnerd.net/gear/racquets/pro-player-racquets/alex-blockx-racquet-player-profile/49026
  47. https://www.tennistourtalk.com/108141/alexander-blockx-its-getting-better-and-better-at-challenger-level
  48. https://www.tennisratio.com/players/AlexanderBlockx.html
  49. https://www.atptour.com/en/players/alexander-blockx/b0pg/player-stats
  50. https://www.facebook.com/Tecnifibre/posts/meet-alexblockx-our-rising-star-from-belgium-alexander-is-a-tecnifibre-player-si/926053662888591/
  51. https://www.youtube.com/watch?v=9mmhhNOxpKc
  52. https://www.atptour.com/en/players/alexander-blockx/b0pg/player-activity?year=2023&matchType=singles
  53. https://www.atptour.com/en/players/alexander-blockx/b0pg/player-activity?year=2024&matchType=singles
  54. https://www.atptour.com/en/players/alexander-blockx/b0pg/player-activity?year=2022&matchType=singles
  55. https://www.atptour.com/en/players/alexander-blockx/b0pg/player-activity?year=2025&matchType=singles
  56. https://opencourt.ca/2022/10/17/atp-tour-monday-oct-17-2022-order-of-play/
  57. https://www.tennisexplorer.com/player/blockx/?annual=2023&type=doubles&surface=2
  58. https://www.tennisabstract.com/cgi-bin/tourney.cgi?t=2024Kobe_CH
  59. https://www.atptour.com/en/scores/stats-centre/live/2025/2979/ms001
  60. https://www.atptour.com/en/scores/stats-centre/live/2025/7542/ms001
  61. https://www.atptour.com/en/scores/stats-centre/live/2025/444/ms001
  62. https://www.tennisexplorer.com/match-detail/?id=2360988
  63. https://www.itftennis.com/en/tournament/m15-sharm-elsheikh/egy/2023/m-itf-egy-06a-2023/
  64. https://www.itftennis.com/en/tournament/m25-falun/swe/2023/m-itf-swe-05a-2023/
  65. https://www.tennisexplorer.com/player/blockx/?annual=all&type=doubles
  66. https://www.itftennis.com/media/9020/2022-year-end-ranking-boys.pdf
  67. https://focusonbelgium.be/en/sport/alexander-blockx-new-world-junior-boys-number-1-tennis
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