Professional career
2021: ATP debut
Riedi reached five finals on the ITF Men's World Tennis Tour, winning three and losing two. In May, he won the first doubles title of his career, with Dominic Stricker, when they won the M15 Majadahonda tournament on clay courts in Spain. In October, he won his first singles title at the M15 Selva Gardena tournament on hard courts in Italy. [2]
Riedi made his ATP debut at the 2021 Swiss Open Gstaad, receiving a wildcard in both the singles draw and the doubles draw with Jakub Paul. He lost the singles in the first round against Federico Delbonis in straight sets.
2022: First Challenger title, Top 200 in singles, top 250 in doubles
In March, he reached his first singles and doubles finals on the ATP Challenger Tour, both at the 2022 Challenger Città di Lugano, Switzerland. He also received a wildcard for the 2022 Geneva Open for the singles and doubles, partnering with Jakub Paul. In the same month, he also won the M25 tournament in Trimbach, Switzerland and in May another M25 in Notthingham, United Kingdom.
In October, in doubles he won the Challenger tournament at Tiburon, California with Valentin Vacherot. In November, he won the 2022 HPP Open Challenger in Helsinki as a qualifier defeating Dimitar Kuzmanov and Jelle Sels, [3] moving 80 positions up in the rankings, finishing the year in the top 200 at No. 197 on 21 November 2022. A week earlier, he reached the top 250 in doubles. The following week he won his next Challenger singles title in Andria, moving up 36 positions to No. 161 on 28 November 2022. [4]
2024: Challenger titles, Top 125, injury and early end of season
In January, he won back-to-back Challenger titles in Oeiras, Portugal and in Ottignies-Louvain-la-Neuve, Belgium defeating in the latter, world No. 40 Borna Ćorić for the title, his highest win by ranking thus far, and returned to the top 175 on 29 January 2024. [8] [9] In September, he suffered a knee injury which put an early end to his season. He subsequently underwent surgery. [10]
2025: Surgery, Major debut and fourth round, back to top 175
Riedi underwent another surgery in January but still made his major debut after qualifying for the main draw at the 2025 Wimbledon Championships. [11] [12] [13] Although he lost to fellow qualifier, major debutant, and local player Oliver Tarvet in the first round, he still rose more than 75 positions up back into the 500 on 14 July 2025. [14] [15]
Ranked No. 435 at the US Open, Riedi qualified for the main draw [16] and recorded his first Grand Slam win over Pedro Martínez. [17] [18] He defeated 19th seed Francisco Cerúndolo in a five-set match, becoming the lowest-ranked player in 25 years (since Danny Sapsford at 1999 Wimbledon) to reach the third round of a major. [19] [20] Following his win over Kamil Majchrzak by retirement, he became the lowest-ranked player to reach a major fourth round since Richard Krajicek at the 2002 Wimbledon Championships, and the lowest-ranked player to do so at the US Open since Jay Berger in 1985. [21] Riedi ultimately lost to Alex de Minaur in the fourth round of the US Open. He returned to the top 175 in the singles rankings on 8 September 2025.
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