ITF M25 - Kashiwa | 04/04 01:00 | 25 | Takeru Yuzuki v Yunseong Chung | 2-6,2-6 | |
ITF M25 - Tsukuba | 03/29 00:30 | 25 | Kazuki Nishiwaki v Yunseong Chung | 6-2,6-3 | |
Challenger Pune | 02/28 13:00 | 25 | [241] Miljan Zekic v Yunseong Chung [358] | 6-3,6-4 | |
Challenger Pune | 02/27 07:05 | 19 | [299] Jay Clarke v Yunseong Chung [359] | 6-7,3-6 | |
Challenger Pune | 02/26 10:30 | 14 | Nitin Kumar Sinha v Yunseong Chung | 2-6,2-6 | |
Challenger Bengaluru | 02/20 07:25 | 19 | [320] Nikola Milojevic v Yunseong Chung [359] | 7-6,6-4 | |
Challenger Bengaluru | 02/19 11:15 | 14 | [424] Dayne Kelly v Yunseong Chung [360] | 6-7,4-6 | |
Challenger Manama | 02/12 08:00 | 14 | Yunseong Chung v Aleksandr Braynin | 5-7,4-6 | |
Challenger Concepcion | 01/22 15:30 | 14 | [128] Karol Drzewiecki v Yunseong Chung [335] | 6-3,6-2 | |
Challenger Piracicaba | 01/17 17:15 | 25 | [385] Carlos Sanchez Jover v Yunseong Chung [335] | 6-3,6-0 | |
Challenger Piracicaba | 01/16 15:10 | 19 | [335] Yunseong Chung v Carlos Sanchez Jover [385] | 6-4,6-3 | |
Challenger Piracicaba | 01/15 18:15 | 14 | Yunseong Chung v Gonzalo Bueno | 6-2,6-2 | |
Challenger Piracicaba | 01/15 17:00 | 14 | Yunseong Chung v Mateus D C C Alves | Cancelled | |
Challenger Tigre | 01/10 17:10 | 25 | [332] Yunseong Chung v Edoardo Lavagno [366] | 3-6,1-6 | |
Challenger Yokkaichi | 11/25 04:10 | 27 | [361] Yunseong Chung v Yosuke Watanuki [173] | Retired | |
Challenger Yokkaichi | 11/24 01:30 | 26 | [361] Yunseong Chung v Mukund Sasikumar [353] | 6-1,6-4 | |
Challenger Yokkaichi | 11/21 02:50 | 25 | [248] Dane Sweeny v Yunseong Chung [363] | 5-7,2-6 | |
Challenger Kobe | 11/15 02:50 | 25 | [363] Yunseong Chung v Yosuke Watanuki [196] | 2-6,2-6 | |
Challenger Kobe | 11/14 02:45 | 19 | [362] Yunseong Chung v Yuta Shimizu [404] | 6-2,7-6 | |
Challenger Kobe | 11/13 05:30 | 14 | Yunseong Chung v Duckhee Lee | 6-2,6-0 | |
Challenger Yokohama | 11/02 03:25 | 26 | [384] Yunseong Chung v Kaichi Uchida [172] | 6-7,3-6 | |
Challenger Yokohama | 11/01 02:55 | 25 | Masamichi Imamura v Yunseong Chung | 3-6,4-6 | |
Challenger Busan | 10/20 02:00 | 26 | [470] Seong Chan Hong v Yunseong Chung [395] | 6-3,7-5 | |
Challenger Busan | 10/18 06:35 | 25 | [395] Yunseong Chung v Chun Hsin Tseng [86] | 7-5,7-5 | |
Challenger Gwangju | 10/04 05:30 | 25 | [397] Yunseong Chung v Jisung Nam [222] | 6-1,3-6,5-7 | |
Challenger Gwangju | 10/03 04:00 | 19 | [397] Yunseong Chung v Seita Watanabe [401] | 6-2,7-6 | |
ATP Seoul | 09/27 10:00 | 25 | [121] Soonwoo Kwon v Yunseong Chung [426] | 7-6,6-7,6-1 | |
ATP Seoul | 09/25 03:50 | 19 | [412] Shintaro Mochizuki v Yunseong Chung [415] | 5-7,4-6 | |
ATP Seoul | 09/24 06:55 | 14 | [415] Yunseong Chung v Dalibor Svrcina [212] | 6-3,4-6,6-1 | |
Challenger Nonthaburi | 09/05 11:00 | 25 | [242] Yosuke Watanuki v Yunseong Chung [418] | Retired |
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.