Royer was born to French parents, but lived in Central and Eastern European countries until he was 17 years old, including the Czech Republic, Serbia, and Poland.[3]
A member of Ninon Tennis Club in Pornichet, he was European U18 champion in both singles and doubles in 2019, playing doubles alongside Harold Mayot.[4]
2022: First ITF title
[edit]In May, Royer won his first ITF title in Ulcinj, Montenegro, defeating Samuel Vincent Ruggeri in the final.
2024: Maiden Challenger title, Top 200
[edit]In April, he defeated Dennis Novak at the ITF Tour event in Oeiras, Portugal to ensure a ranking high enough to make his debut in senior qualifying for a Grand Slam at the 2024 French Open.[5] In the men's qualifying at Roland Garros in May 2024 he won his first round match against Dmitry Popko.[6] In the second round of qualifying he lost in the deciding set to Thiago Monteiro of Brazil.[7]
In May, Royer reached his first Challenger final in Tunis, losing to Oriol Roca Batalla in the final.[8]
In the first round of qualifying at the 2024 Wimbledon Championships he lost to eventual qualifier Li Tu of Australia.[9] Competing in the qualifying at the 2024 US Open he defeated Hugo Dellien of Bolivia and local player Ethan Quinn[10][11] before losing to Gabriel Diallo of Canada in the final qualifying round.[12]
In September, Royer won his maiden Challenger title in Sibiu, Romania, defeating compatriot Luka Pavlovic in straight sets in the final.[13]
2025: Major debut & first win, ATP final, top 80
[edit]In February, Royer won back-to-back Challenger 100 titles at the two editions of the Rwanda Challenger, defeating Andrej Martin in the final, [14][15] and the following week at the Rwanda II Challenger, defeating Guy Den Ouden in the final.[16][17] As a result, Royer reached the top 125 at world No. 121 on 17 March 2025.[18] He reached his third straight final at the 2025 Zadar Open, where he lost to Borna Ćorić and reached the top 115 in the ATP rankings on 24 March 2025.[19]
In May, Royer received a main draw wildcard for the 2025 French Open, marking his Grand Slam debut.[20][21] He lost to Daniel Elahi Galán in the first round.[22]
In June, Royer reached the final at the 2025 Bratislava Open. He lost to Dino Prižmić in the final.[23]
In July, Royer made his Wimbledon debut, reaching the main draw as a qualifier after defeating fellow countryman Titouan Droguet in the final round.[24] In the main draw, Royer defeated 26th seed Stefanos Tsitsipas recording his first major win.[25] He lost in the second round to fellow countryman Adrian Mannarino.[26] Royer also made his ATP Tour debut as a qualifier at the Canadian Open.[27] He lost in the first round to Nicolas Arseneault. In August, Royer earned his first Masters 1000 win at the 2025 Cincinnati Open as a qualifier, defeating Sebastian Ofner in the first round.[28] He lost in three sets to fourteenth seed Karen Khachanov in the second round.[29]
In August, Royer made his US Open debut after receiving a wildcard into the main draw.[30] He recorded his second major win by defeating Bu Yunchaokete in the first round,[31] but lost to Denis Shapovalov in the second round.[citation needed]
At the 2025 Hangzhou Open Royer qualified for the main draw and reached his first ATP final upsetting three seeds en route: top seed Andrey Rublev, recording his first top-20 win, seventh seed Learner Tien and fourth seed Corentin Moutet.[32][33] As a result he reached a new career-high of 76 in the singles rankings on 22 September 2025.[34] He lost to Alexander Bublik in the final.[35]