Anning, China 04/26 03:00 26 [486] Yunseong Chung v Jordan Thompson [98] 3-6,4-6
Anning, China 04/24 09:20 25 [277] Wu, Di v Yunseong Chung [486] 6-7,3-6
Challenger Anning Qual 04/22 04:50 - Hugo Grenier v Yunseong Chung Retired
Challenger Anning Qual 04/21 05:00 25 Yi, Chu-Huan v Yunseong Chung 2-6,6-7
Nanchang, China 04/19 04:30 26 Nedovyesov, Aleksandr v Yunseong Chung 6-4,6-2
Nanchang, China 04/17 03:00 25 Yunseong Chung v Tatsuma Ito 6-4,7-6
Challenger Nanchang Qual 04/15 05:25 46 Mukund, S. v Yunseong Chung 2-6,4-6
Challenger Nanchang Qual 04/14 04:40 45 Wu, Hao v Yunseong Chung 3-6,1-6
Challenger Taipei Qual 04/07 02:00 45 Grills, Jacob v Yunseong Chung 6-3,2-6,6-2
Challenger Qujing 03/20 04:45 25 Jaziri, Malek v Yunseong Chung 6-2,6-4
Challenger Qujing Qual 03/18 05:45 46 Yunseong Chung v Elgin, M. 6-3,6-7,6-3
Challenger Qujing Qual 03/17 02:00 45 Yunseong Chung v Toshihide Matsui Retired
Shenzhen, China, Qualifying 03/11 06:00 46 Yunseong Chung v Quinzi, Gianluigi 6-7,6-3,5-7
Shenzhen, China, Qualifying 03/11 01:30 45 Wang, Chuhan v Yunseong Chung Retired
Challenger Zhuhai Qual 03/04 08:35 46 Alex Bolt v Yunseong Chung 6-4,6-2
Challenger Zhuhai Qual 03/03 06:50 45 Yunseong Chung v Andrea Vavassori 6-3,4-6,6-3
Challenger Yokohama 02/27 02:25 25 Yunseong Chung v Jason Jung 2-6,7-6,4-6
Yokohama, Japan, Qualifying 02/26 04:05 54 Makoto Ochi v Yunseong Chung 3-6,6-1,1-6
Yokohama, Japan, Qualifying 02/25 02:35 46 Yunseong Chung v Niki, Takuto 6-7,6-3,6-3
Yokohama, Japan, Qualifying 02/24 05:05 45 Shiga, Masato v Yunseong Chung 0-6,5-7
Spain F4, Singles Qualifying 02/08 11:00 26 Ivan Gakhov v Yunseong Chung 6-4,6-4
Spain F4, Singles Qualifying 02/07 11:00 25 Yunseong Chung v Briand, Jurgen Retired
ITF Spain F3 01/30 13:40 25 Gimeno-Traver, Daniel v Yunseong Chung 6-4,6-1
ITF Spain F2 01/27 10:00 28 Yunseong Chung v Munoz-De la Nava, Daniel 3-6,4-6
ITF Spain F2 01/26 13:00 27 Monteiro, Joao v Yunseong Chung 7-6,5-7,3-6
ITF Spain F2 01/25 09:00 26 Yunseong Chung v Tyurnev, Evgeny 6-4,2-6,6-3
ITF Spain F2 01/23 10:35 25 Yunseong Chung v Mertens, Nico 6-4,6-3
ITF Spain F1 01/20 11:50 28 Munoz-De la Nava, Daniel v Yunseong Chung 6-4,6-3
ITF Spain F1 01/19 10:00 27 Gigounon, Germain v Yunseong Chung 5-7,3-6
ITF Spain F1 01/17 09:00 26 Mikhail Korovin v Yunseong Chung 5-7,1-6

Wikipedia - Chung Yun-seong

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.