| Challenger - Gwangju | 04/18 02:00 | 26 | [171] Lloyd Harris v Yunseong Chung [383] | 6-4,6-4 | |
| Challenger - Gwangju | 04/16 03:15 | 25 | [383] Yunseong Chung v Paul Jubb [385] | 6-4,4-6,6-3 | |
| Challenger - Busan | 04/09 05:30 | 25 | [387] Yun-Seong Chung v Mark Lajal [211] | 3-6,2-6 | |
| Challenger - Busan | 04/08 02:30 | 19 | [331] Hiroki Moriya v Yun-Seong Chung [388] | 4-6,6-7 | |
| Challenger - Busan | 04/07 05:15 | 14 | [430] Stefanos Sakellaridis v Yun-Seong Chung [388] | 6-1,2-6,3-6 | |
| ITF - M15 - Tsukuba | 03/29 06:45 | 27 | Yun-Seong Chung v Hikaru Shiraishi | 6-2,4-6,4-6 | |
| ITF - M15 - Tsukuba | 03/28 01:30 | 26 | Yun-Seong Chung v Takuya Kumasaka | 7-6,1-6,6-4 | |
| ITF - M15 - Tsukuba | 03/27 00:55 | 25 | Yun-Seong Chung v Yu Tanaka | 6-3,7-6 | |
| ITF - M15 - Nishi-Tokyo | 03/23 01:00 | 26 | Takuya Kumasaka v Yunseong Chung | CANC | |
| ITF - M15 - Nishi-Tokyo | 03/22 04:05 | 27 | Duckhee Lee v Yunseong Chung | 6-4,6-0 | |
| ITF - M15 - Nishi-Tokyo | 03/21 00:55 | 26 | Linang Xiao v Yunseong Chung | 2-6,4-6 | |
| ITF - M15 - Nishi-Tokyo | 03/20 02:30 | 25 | Masamichi Imamura v Yunseong Chung | 6-7,2-6 |
Chung Yun-seong (kor.: 정윤성; * 27. März 1998 in Seoul) ist ein südkoreanischer Tennisspieler.