Luciano Tadeo Darderi (born 14 February 2002) is an Italian professional tennis player born in Argentina. He has a career-high ATP singles ranking of world No. 16 achieved on 18 May 2026 and a career-high doubles ranking of No. 104 reached on 8 August 2022. He is currently the No. 4 singles player from Italy.

Darderi has won five ATP Tour singles titles, all of them on clay. He represented Italy at the Olympics in Paris in 2024.

In February 2020, Darderi won the doubles category at the prestigious Banana Bowl, with local player Gustavo Heide. He had good results in Juniors, maintaining a 62–25 singles win-loss record and reached an ITF junior combined ranking of world No. 8 on 17 February 2020.

Darderi won his maiden ATP Challenger title at the 2021 Challenger de Buenos Aires in doubles partnering with Juan Bautista Torres. Darderi reached his first singles ATP Challenger Tour final at the 2021 São Paulo Challenger de Tênis as a qualifier.

Darderi made his ATP debut at the 2023 Córdoba Open as a qualifier where he recorded his first ATP win against Hugo Gaston. He entered the main draw of the 2023 Mexican Open as a lucky loser following the withdrawal of top seed Carlos Alcaraz. In August, he won his first Challenger title in Todi. He won his second Challenger title in Lima. As a result he made his top 125 debut on 13 November 2023.

Ranked No. 136, Darderi qualified for the main draw and recorded his next five ATP wins at the 2024 Córdoba Open. He defeated Tomás Barrios Vera and stunned fourth seed Sebastian Ofner and seventh seed Yannick Hanfmann to reach his first ATP semifinal. Next he defeated defending champion and second seed Sebastián Báez, his first top 30 win, to reach his first ATP career final where he faced fellow qualifier Facundo Bagnis and won the title in straight sets. It was the third time since the inception of the ATP Tour in 1990 that two qualifiers met in an ATP 250 tournament final, after 2015 Sydney and 2018 Kitzbuhel. As a result he moved up 60 positions and reached the top 80 in the rankings on 12 February 2024. He entered the next Golden swing tournament, the 2024 Argentina Open with a special exempt (SE) status. For the next tournament, the 2024 Chile Open, he received a wildcard where he also reached the quarterfinals defeating again two Argentines, Facundo Bagnis and this time qualifier Juan Manuel Cerúndolo.

Darderi made his Masters debut at the 2024 Miami Open where he lost to Denis Shapovalov. Following a second career semifinal showing at the 2024 U.S. Men's Clay Court Championships he reached the top 65 in the singles rankings on 8 April 2024, where he defeated en route local wildcard Denis Kudla and two seeds, second seed Francisco Cerúndolo and seventh seed Marcos Giron.

Following his home tournament in Rome where he reached the third round of a Masters for the first time with wins over Denis Shapovalov and 31st seed Mariano Navone, before losing to fifth seed and eventual champion Alexander Zverev, he also reached the semifinals of the next home tournament in Turin as a wildcard, losing to top seed Lorenzo Musetti. As a result he reached the top 50 at world No. 47 on 20 May 2024. By reaching his second ATP semifinal of the season at the 2024 ATP Lyon Open after a walkover from Arthur Rinderknech, he entered the top 40 in the rankings the following week.