| Chung Yun-seong 정윤성 | |
| Residence: | Yongin, South Korea |
| Birth Date: | 1998 3, df=yes |
| Birth Place: | Seoul, South Korea |
| Height: | 1.78m (05.84feet) |
| Turnedpro: | 2017 |
| Plays: | Right-handed (two handed-backhand) |
| Careerprizemoney: | $222,096 |
| Singlesrecord: | 0–3 |
| Singlestitles: | 0 |
| Highestsinglesranking: | No. 233 (22 July 2019) |
| Currentsinglesranking: | No. 369 (15 January 2024) |
| Usopenresult: | Q1 (2019) |
| Doublesrecord: | 1–1 |
| Doublestitles: | 0 |
| Highestdoublesranking: | No. 129 (22 May 2023) |
| Currentdoublesranking: | No. 169 (15 January 2024) |
| Updated: | 19 January 2024 |
| Hangul: | 정윤성 |
| Rr: | Jeong Yunseong |
| Mr: | Chŏng Yunsŏng |
Chung Yun-seong (Korean: 정윤성; born 27 March 1998) is a South Korean tennis player.
Chung has a career high ATP singles ranking of No. 233 achieved on 22 July 2019. He also has 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.[1]
| Outcome | Year | width=160 | Championship | Surface | width=180 | Partner | width=180 | Opponent | width=120 | Score |
|---|---|---|---|---|---|---|---|---|---|---|
| Runner-up | 2016 | French Open | Clay |  Orlando Luz |  Yishai Oliel Patrik Rikl | 3–6, 4–6 |
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| Result | W–L | Date | Tournament | Tier | Surface | Opponent | Score | |
|---|---|---|---|---|---|---|---|---|
| Loss | 0–1 | Korea F6, Gimcheon | Futures | Hard |  Kim Cheong-Eui | 2–6, 4–6 | ||
| Loss | 0–2 | Korea F3, Gimcheon | Futures | Hard | Jung-Woong Na | 3–6, 1–6 | ||
| Loss | 0–3 | China F7, Wuhan | Futures | Hard |  Akira Santillan | 1–6, 4–6 | ||
| Win | 1–3 | Korea F2, Gyeongsan | Futures | Hard | Nam Ji-sung | 6–4, 6–3 | ||
| Win | 2–3 | Korea F3, Daegu | Futures | Hard | Nam Ji-sung | 6–1, 6–3 | ||
| Win | 3–3 | M15 Monastir, Tunisia | World Tennis Tour | Hard |  Aziz Dougaz | 6–1, 7–5 | ||
| Win | 4–3 | M15 Monastir, Tunisia | World Tennis Tour | Hard |  Jeremy Beale | 6–4, 6–2 | ||
| Loss | 4–4 | M25 Monastir, Tunisia | World Tennis Tour | Hard |  Harold Mayot | 4–6, 6–0, 4–6 |
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| Result | W–L | Date | Tournament | Tier | Surface | Partner | Opponents | Score | |
|---|---|---|---|---|---|---|---|---|---|
| Loss | 0–1 | Astana, Kazakhstan | Challenger | Hard |  Jurabek Karimov |  Konstantin Kravchuk  Denys Molchanov | 2–6, 2–6 | ||
| Win | 1–1 | Japan F2, Tokyo | Futures | Hard | Soonwoo Kwon | Issei Okamura Kento Takeuchi | 2–6, 6–2, [10–3] | ||
| Loss | 1–2 | Korea F2, Sangju | Futures | Hard | Lim Yong-kyu | Nam Ji-sung Song Min-kyu | 4–6, 4–6 | ||
| Loss | 1–3 | Thailand F1, Hua Hin | Futures | Hard |  Xin Gao | Chen Ti  John Paul Fruttero | 2–6, 2–6 | ||
| Win | 2–3 | Chinese Taipei F2, Kaohsiung | Futures | Hard |  Patrik Niklas-Salminen | Yu Hsiang Chiu Shao-Fan Liu | 7–5, 6–4 | ||
| Win | 3–3 | Indonesia F4, Jakarta | Futures | Hard | Shintaro Imai |  Julien Cagnina Enzo Couacaud | 6–2, 6–4 | ||
| Win | 4–3 | Indonesia F5, Jakarta | Futures | Hard | Shintaro Imai | Issei Okamura Kento Takeuchi | 6–2, 3–6, [10–6] | ||
| Win | 5–3 | Spain F3, Mallorca | Futures | Clay | Rio Noguchi | Bruno Sant'Anna  David Vega Hernández | 2–6, 7–6(8–6), [10–8] | ||
| Win | 6–3 | Korea F3, Daegu | Futures | Hard | Seong Chan Hong | Soonwoo Kwon Lim Yong-kyu | walkover | ||
| Loss | 6–4 | Astana, Kazakhstan | Challenger | Hard | Nam Ji-sung |  Andrey Golubev Aleksandr Nedovyesov | 4–6, 4–6 | ||
| Loss | 6–5 | M25 Nonthaburi, Thailand | World Tennis Tour | Hard | Corentin Denolly |  Sonchat Ratiwatana Sanchai Ratiwatana | 6–3, 4–6, [5–10] | ||
| Win | 7–5 | M25 Aktobe, Kazakhstan | World Tennis Tour | Hard |  Aldin Šetkić |  Riccardo Balzerani Francesco Forti | 6–3, 6–4 | ||
| Loss | 7–6 | M15 Antalya, Turkey | World Tennis Tour | Clay | Oleksandr Ovcharenko | Max Houkes Sidane Pontjodikromo | 5–7, 1–6 | ||
| Win | 8–6 | M15 Monastir, Tunisia | World Tennis Tour | Hard | Shintaro Imai |  Filip Bergevi Jonathan Mridha | 6–2, 7–6(7–4) | ||
| Win | 9–6 | M15 Monastir, Tunisia | World Tennis Tour | Hard | Shintaro Imai | Aziz Dougaz Benjamin Lock | 6–3, 6–2 | ||
| Loss | 9–7 | M25 Champaign, United States | World Tennis Tour | Hard | Rio Noguchi | Ben Shelton Eliot Spizzirri | 4–6, 0–6 | ||
| Win | 10–7 | Orlando, USA | Challenger | Hard | Michail Pervolarakis | Malek Jaziri Kaichi Uchida | 6–7(5–7), 7–6(7–3), [16–14] | ||
| Win | 11–7 | Nonthaburi, Thailand | Challenger | Hard |  Ajeet Rai | Francis Casey Alcantara Christopher Rungkat | 6–1, 7–6(8–6) | ||
| Loss | 11–8 | Seoul, South Korea | Challenger | Hard | Aleksandar Kovacevic | Kaichi Uchida Wu Tung-lin | 7–6(7–2), 5–7, [9–11] | ||
| Loss | 11–9 | Tigre, Argentina | Challenger | Clay | Christian Langmo | Daniel Dutra da Silva Oleg Prihodko | 2–6, 2–6 | ||
| Win | 12–9 | Bangalore, India | Challenger | Hard | Hsu Yu-hsiou |  Anirudh Chandrasekar Vijay Sundar Prashanth | 3–6, 7–6(9–7), [11–9] | ||
| Loss | 12–10 | M25 Kashiwa, Japan | World Tennis Tour | Hard | Shintaro Imai | Hsu Yu-hsiou Huang Tsung-hao | 6–7(5–7), 6–2, [10–12] | ||
| Win | 13–10 | M25 Jakarta, Indonesia | World Tennis Tour | Hard | Jeong Yeong-Seok | Makoto Ochi Yuta Shimizu | 4–6, 7–6(7–1), [10–8] | ||
| Loss | 13–11 | Seoul, South Korea | Challenger | Hard | Yuta Shimizu | Max Purcell Yasutaka Uchiyama | 1–6, 4–6 | ||
| Win | 14–11 | M25 Anseong, South Korea | World Tennis Tour | Hard | Takeru Yuzuki | Shunsuke Mitsui Naoki Tajima | 7–6(7–3), 6–4 |