Chung Yun-seong (; born 27 March 1998) is a South Korean tennis player. He has a career high ATP singles ranking of No. 233 achieved on 22 July 2019 and a career high ATP doubles ranking of No. 129 achieved on 22 May 2023. Chung has won three doubles ATP Challenger titles as well as four ITF singles and five doubles titles.
On the junior tour, Chung had a career-high combined ranking of 3 achieved on 21 March 2016. Chung was a semifinalist at the 2016 Australian Open boys' singles event and the 2015 US Open boys' singles event where he fell to both eventual champions Oliver Anderson and Taylor Fritz, respectively. Chung was also a singles finalist at the Osaka Mayor's Cup in 2014.
He and Orlando Luz lost to Yishai Oliel of Israel and Patrik Rikl of the Czech Republic in the final of the 2016 French Open boys' doubles, 6–3, 6–4.
Performance timeline
Singles Tournament2019W–LWin %Grand Slam tournamentsAustralian Open0–0French Open0–0Wimbledon0–0US OpenQ10–0Win–loss0–0
Junior Grand Slam finals
Doubles: 1 (1 runner-up) OutcomeYearChampionshipSurfacePartnerOpponentScoreRunner-up 2016 French Open Clay Orlando Luz Yishai Oliel Patrik Rikl 3–6, 4–6
ATP Challenger and ITF Futures/World Tennis Tour finals Singles: 8 (4–4) LegendATP Challenger (0–0)ITF Futures (4–4)Finals by surfaceHard (4–4)Clay (0–0)
ResultW–LDateTournamentTierSurfaceOpponentScoreLoss0–1Korea F6, GimcheonFuturesHard Kim Cheong-Eui2–6, 4–6Loss0–2Korea F3, GimcheonFuturesHard Jung-Woong Na3–6, 1–6Loss0–3China F7, WuhanFuturesHard Akira Santillan1–6, 4–6Win1–3Korea F2, GyeongsanFuturesHard Nam Ji-sung6–4, 6–3Win2–3Korea F3, DaeguFuturesHard Nam Ji-sung6–1, 6–3Win3–3M15 Monastir, TunisiaWorld Tennis TourHard Aziz Dougaz6–1, 7–5Win4–3M15 Monastir, TunisiaWorld Tennis TourHard Jeremy Beale6–4, 6–2Loss4–4M25 Monastir, TunisiaWorld Tennis TourHard Harold Mayot4–6, 6–0, 4–6
Doubles: 25 (14 titles, 11 runner-ups) LegendATP Challenger (3–5)ITF Futures (11–6)Finals by surfaceHard (13–9)Clay (1–2)
ResultW–LDateTournamentTierSurfacePartnerOpponentsScoreLoss0–1Astana, KazakhstanChallengerHard Jurabek Karimov Konstantin Kravchuk Denys Molchanov2–6, 2–6Win1–1Japan F2, TokyoFuturesHard Soonwoo Kwon Issei Okamura Kento Takeuchi2–6, 6–2, [10–3]Loss1–2Korea F2, SangjuFuturesHard Lim Yong-kyu Nam Ji-sung Song Min-kyu4–6, 4–6Loss1–3Thailand F1, Hua HinFuturesHard Xin Gao Chen Ti John Paul Fruttero2–6, 2–6Win2–3Chinese Taipei F2, KaohsiungFuturesHard Patrik Niklas-Salminen Yu Hsiang Chiu Shao-Fan Liu7–5, 6–4Win3–3Indonesia F4, JakartaFuturesHard Shintaro Imai Julien Cagnina Enzo Couacaud6–2, 6–4Win4–3Indonesia F5, JakartaFuturesHard Shintaro Imai Issei Okamura Kento Takeuchi6–2, 3–6, [10–6]Win5–3Spain F3, MallorcaFuturesClay Rio Noguchi Bruno Sant'Anna David Vega Hernández2–6, 7–6(8–6), [10–8]Win6–3Korea F3, DaeguFuturesHard Seong Chan Hong Soonwoo Kwon Lim Yong-kyuwalkoverLoss6–4Astana, KazakhstanChallengerHard Nam Ji-sung Andrey Golubev Aleksandr Nedovyesov4–6, 4–6Loss6–5M25 Nonthaburi, ThailandWorld Tennis TourHard Corentin Denolly Sonchat Ratiwatana Sanchai Ratiwatana6–3, 4–6, [5–10]Win7–5M25 Aktobe, KazakhstanWorld Tennis TourHard Aldin Šetkić Riccardo Balzerani Francesco Forti6–3, 6–4Loss7–6M15 Antalya, TurkeyWorld Tennis TourClay Oleksandr Ovcharenko Max Houkes Sidane Pontjodikromo5–7, 1–6Win8–6M15 Monastir, TunisiaWorld Tennis TourHard Shintaro Imai Filip Bergevi Jonathan Mridha6–2, 7–6(7–4)Win9–6M15 Monastir, TunisiaWorld Tennis TourHard Shintaro Imai Aziz Dougaz Benjamin Lock6–3, 6–2Loss9–7M25 Champaign, United StatesWorld Tennis TourHard Rio Noguchi Ben Shelton Eliot Spizzirri4–6, 0–6Win10–7Orlando, USAChallengerHard Michail Pervolarakis Malek Jaziri Kaichi Uchida6–7(5–7), 7–6(7–3), [16–14]Win11–7Nonthaburi, ThailandChallengerHard Ajeet Rai Francis Casey Alcantara Christopher Rungkat6–1, 7–6(8–6)Loss11–8Seoul, South KoreaChallengerHard Aleksandar Kovacevic Kaichi Uchida Wu Tung-lin7–6(7–2), 5–7, [9–11]Loss11–9Tigre, ArgentinaChallengerClay Christian Langmo Daniel Dutra da Silva Oleg Prihodko2–6, 2–6Win12–9Bangalore, IndiaChallengerHard Hsu Yu-hsiou Anirudh Chandrasekar Vijay Sundar Prashanth3–6, 7–6(9–7), [11–9]Loss12–10M25 Kashiwa, JapanWorld Tennis TourHard Shintaro Imai Hsu Yu-hsiou Huang Tsung-hao6–7(5–7), 6–2, [10–12]Win13–10M25 Jakarta, IndonesiaWorld Tennis TourHard Jeong Yeong-Seok Makoto Ochi Yuta Shimizu4–6, 7–6(7–1), [10–8]Loss13–11Seoul, South KoreaChallengerHard Yuta Shimizu Max Purcell Yasutaka Uchiyama1–6, 4–6Win14–11M25 Anseong, South KoreaWorld Tennis TourHard Takeru Yuzuki Shunsuke Mitsui Naoki Tajima7–6(7–3), 6–4
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