Challenger Salinas | 04/05 20:45 | 25 | Blu Baker v Yunseong Chung | 2-6,3-6 | |
Challenger Lugano | 03/29 12:15 | 25 | [367] Yunseong Chung v Yuichi Sugita [229] | 3-6,4-6 | |
Challenger Lugano | 03/28 10:10 | 19 | [306] Lucas Miedler v Yunseong Chung [367] | 3-6,4-6 | |
Challenger Lugano | 03/27 13:40 | 14 | [456] Antoine Bellier v Yunseong Chung [367] | 6-7,2-6 | |
Challenger Biel | 03/20 15:30 | 14 | [365] Yunseong Chung v Marek Gengel [430] | 6-3,4-6,3-6 | |
Challenger Cleveland | 01/30 20:35 | 14 | [416] Yunseong Chung v Michael Geerts [339] | Retired | |
ITF - Monastir M25 | 01/23 09:45 | 29 | [416] Yunseong Chung v Harold Mayot [471] | 4-6,6-0,4-6 | |
ITF - Monastir M25 | 01/22 09:00 | 28 | Yunseong Chung v Titouan Droguet | 7-6,6-4 | |
ITF - Monastir M25 | 01/21 12:30 | 27 | Gleb Sakharov v Yunseong Chung | 3-6,3-6 | |
ITF - Monastir M25 | 01/20 11:15 | 26 | Jumpei Yamasaki v Yunseong Chung | 4-6,2-6 | |
ITF - Monastir M25 | 01/18 10:45 | 25 | Alexander Donski v Yunseong Chung | 4-6,2-6 | |
ITF - Monastir M25 | 01/15 08:25 | 27 | [415] Yunseong Chung v Skander Mansouri [438] | 6-4,3-6,4-6 | |
ITF - Monastir M25 | 01/14 12:00 | 26 | Yunseong Chung v Josh Reid | 6-2,6-0 | |
ITF - Monastir M25 | 01/12 08:00 | 25 | Yunseong Chung v Skander Mezouar | 6-0,6-2 | |
ITF - Meitar M25 | 11/06 08:00 | 25 | Ben Patael v Yunseong Chung | Cancelled | |
ITF - Meitar M25 | 11/03 09:55 | 26 | Arnaud Bovy v Yunseong Chung | 6-4,3-6,6-4 | |
ITF - Meitar M25 | 11/02 08:00 | 25 | Joshua Luck v Yunseong Chung | 3-6,1-6 | |
Challenger Columbus | 09/21 14:00 | 25 | [419] Yunseong Chung v Ji Sung Nam [382] | 6-3,4-6,6-7 | |
Challenger Columbus | 09/20 14:00 | 19 | [367] Alexis Galarneau v Yunseong Chung [419] | 4-6,4-6 | |
Challenger Columbus | 09/19 18:35 | 14 | Justin Boulais v Yunseong Chung | 6-7,3-6 | |
ATP Winston-Salem | 08/21 20:10 | 14 | [415] Yunseong Chung v Yosuke Watanuki [255] | 3-6,6-7 | |
ITF - Decatur M25 | 08/06 17:10 | 27 | Yunseong Chung v Eliot Spizzirri | 4-6,4-6 | |
ITF - Decatur M25 | 08/05 17:55 | 26 | Jumpei Yamasaki v Yunseong Chung | 2-6,2-6 | |
ITF - Decatur M25 | 08/04 18:45 | 25 | Yunseong Chung v Nathan Ponwith | 6-2,6-1 | |
ITF - Champaign M25 | 07/28 17:25 | 25 | Yunseong Chung v Ben Shelton | 5-7,0-6 | |
Challenger Nur-Sultan | 07/19 10:05 | 25 | [405] Yunseong Chung v Hugo Grenier [252] | 7-6,3-6,1-6 | |
Challenger Nur-Sultan | 07/15 06:00 | 26 | [159] Roman Safiullin v Yunseong Chung [393] | 6-3,6-4 | |
Challenger Nur-Sultan | 07/13 07:15 | 25 | [393] Yunseong Chung v Yan Bondarevskiy [464] | 6-3,6-4 | |
ITF - Monastir M15 | 05/28 08:30 | 27 | [443] Thomas Fancutt v Yunseong Chung [409] | Retired | |
ITF - Monastir M15 | 05/27 08:30 | 26 | Yuta Kikuchi v Yunseong Chung | 2-6,6-3,1-6 |
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.