Jérôme Cyrill Kym (born 12 February 2003) is a Swiss professional tennis player. He has a career-high ATP singles ranking of No. 123 and a doubles ranking of No. 192, both achieved on 19 May 2025.
Kym represents Switzerland at the Davis Cup, where he has a W/L record of 3–2.
Junior career Kym had successful results on the ITF junior circuit, maintaining a 93–27 singles win-loss record. He reached an ITF junior combined ranking of world No. 5 on 11 October 2021.
Professional career
2019: Davis Cup debut In February 2019, partnering Henri Laaksonen, they defeated the Russian duo of Evgeny Donskoy and Andrey Rublev in his first doubles Davis Cup tie.
2024-2025: ATP, Top 125, Major debut and third round Kym won his maiden Challenger title at the 2024 UniCredit Czech Open as a qualifier defeating Tseng Chun-hsin. Following his second Challenger title at the 2024 Zug Open he reached the top 200 at world No. 181 on 29 July 2024.
At the 2024 Swiss Indoors in Basel, Kym qualified for his first ATP and ATP 500 main draw but lost to fifth seed Ugo Humbert. He reached the top 125 at world No. 123 on 19 May 2025, following the 2025 Italian Open. Kym recorded his first ATP wins at the 2025 Swiss Open Gstaad as a wildcard, over qualifiers Calvin Hemery and Francesco Passaro to reach his first ATP Tour quarterfinal.
Kym qualified for his first Grand Slam main draw at the 2025 US Open and defeated Ethan Quinn for his first major win. He defeated 30th seed Brandon Nakashima in a five-set match to reach the third round of a major for the first time in his debut. He was eliminated in the third round after a four-set defeat to world number four Taylor Fritz. In total, he earned around 237,000 US dollars in prize money.
Performance timelines
Singles Current through the 2026 French Open. Tournament202120222023202420252026SRW–LWin %Grand Slam tournamentsAustralian OpenAAAAQ2Q20 / 00–0French OpenAAAAQ1Q10 / 00–0WimbledonAAAAQ1Q30 / 00–0US OpenAAAQ33R0 / 12–1Win–loss0–00–00–00–02–10–00 / 12–1National representationDavis CupG2AAG1G10 / 03–2ATP Masters 1000Indian Wells OpenAAAAAA0 / 00–0Miami OpenAAAAAA0 / 00–0Monte-Carlo MastersAAAAAA0 / 00–0Madrid OpenAAAAQ2A0 / 00–0Italian OpenAAAAQ1A0 / 00–0Canadian OpenAAAAAA0 / 00–0Cincinnati OpenAAAAA0 / 00–0Shanghai MastersNHAAA0 / 00–0Paris MastersAAAAA0 / 00–0Win–loss0–00–00–00–00–00–00 / 00–0Career statistics202120222023202420252026SRW–LWin%Tournaments000121Career total: 4Titles000000Career total: 0Finals000000Career total: 0Hard win–loss1–00–00–01–12–31–00 / 25–4Clay win–loss0–00–00–00–02–11–10 / 23–2Grass win–loss0–00–00–00–00–00–00 / 00–0Overall win–loss1–00–00–01–14–42–10 / 48–6Win %Year-end ranking1124428484134187
ATP Challenger Tour finals
Singles: 3 (2 titles, 1 runner-up) LegendATP Challenger Tour (2–1)
ResultW–LDateTournamentTierSurfaceOpponentScoreWin1–0Czech Open, Czech RepublicChallengerClay Tseng Chun-hsin6–2, 3–6, 6–2Win2–0Zug Open, SwitzerlandChallengerClay Román Andrés Burruchaga6–4, 6–4Loss2–1Platzmann Open, GermanyChallengerClay Tom Gentzsch4–6, 6–7(4–7)
Doubles: 3 (1 title, 2 runner-ups) LegendATP Challenger Tour (1–2)Finals by surfaceHard (0–2)Clay (1–0)
ResultW–LDateTournamentTierSurfacePartnerOpponentsScoreLoss0–1Challenger di Lugano, SwitzerlandChallengerHard (i) Leandro Riedi Ruben Bemelmans Daniel Masur4–6, 7–6(7–5), [7–10]Loss0–2Canberra Tennis International, AustraliaChallengerHard Pierre-Hugues Herbert Ryan Seggerman Eliot Spizzirri6–1, 5–7, [5–10]Win1–2Danube Upper Austria Open, AustriaChallengerClay Nico Hipfl David Stevenson Ryan Seggerman7–5, 3–6, [10–2]
ITF World Tennis Tour finals
Singles: 7 (3 titles, 4 runner-ups) LegendITF WTT (3–4)Finals by surfaceHard (2–3)Clay (1–1)
ResultW–LDateTournamentTierSurfaceOpponentScoreLoss0–1M15 Heraklion, GreeceWTTHard Omar Jasika2–6, 2–6Loss0–2M25 Setúbal, PortugalWTTHard Adrià Soriano Barrera6–7(7–9), 3–6Loss0–3M25 Plaisir, FranceWTTHard (i) Antoine Hoang6–7(0–7), 3–6Win1–3M25 Trento, ItalyWTTHard (i) Alastair Gray7–6(9–7), 6–2Win2–3M15 Manacor, SpainWTTHard Pol Martín Tiffon6–4, 6–2Win3–3M15 Antalya, TurkeyWTTClay Yanaki Milev7–5, 6–2Loss3–4M15 Villach, AustriaWTTClay Justin Engel3–6, 6–3, 3–6
Doubles: 5 (2 titles, 3 runner-ups) LegendITF WTT (2–3)Finals by surfaceHard (0–1)Clay (2–2)
ResultW–LDateTournamentTierSurfacePartnerOpponentsScoreLoss0–1M15 Antalya, TurkeyWTTClay Maks Kaśnikowski Bruno Kuzuhara Victor LilovwalkoverLoss0–2M25 Split, CroatiaWTTClay Maks Kaśnikowski Piotr Matuszewski Oleg Prihodko2–6, 6–7(6–8)Loss0–3M15 Manacor, SpainWTTHard Adrià Soriano Barrera Michiel de Krom Ryan Nijboer4–6, 6–4, [9–11]Win1–3M25 Hammamet, TunisiaWTTClay Raphaël Collignon Luca Giacomini Giuseppe Tresca6–4, 7–5Win2–3M15 Villach, AustriaWTTClay Nico Hipfl Adrian Oetzbach Miloš Karol6–4, 6–3
References
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