Ground: Hardcourt outdoor
| ITF M15 Maanshan | 2025/08/28 04:37 | Vishnu Vardhan v Yunseok Jang | 6-3,7-5 |
| ITF M15 Maanshan | 2025/08/26 03:00 | Linghao Zhang v Yunseok Jang | 4-6,1-6 |
| ITF M15 Maanshan | 2025/08/21 02:00 | Yunseok Jang v Maxim Zhukov | 4-6,6-7 |
| ITF M15 Maanshan | 2025/08/20 04:03 | He Ziheng v Yunseok Jang | 2-6,0-6 |
| ITF M15 Andong | 2025/05/21 05:33 | Soonwoo Kwon v Yunseok Jang | 6-1,6-2 |
| ITF M15 Luan | 2025/04/09 07:14 | Rigele Te v Yunseok Jang | 6-3,6-2 |
| ITF M15 Nonthaburi Qual | 2025/03/23 06:00 | Suk Hyun Choo v Yunseok Jang | 6-0,6-3 |
| ITF M15 Nonthaburi | 2025/03/20 04:30 | Alex Knaff v Yunseok Jang | 6-2,3-6,6-1 |
| Challenger Seoul | 2025/10/27 02:00 | Yunseong Chung v Yuki Mochizuki | 4-6,4-6 |
| Challenger Seoul | 2025/10/26 01:00 | Kaichi Uchida v Yunseong Chung | 6-4,3-6,4-6 |
| ITF M25 Taipei | 2025/08/28 02:00 | Yuki Mochizuki v Yunseong Chung | 7-6,6-4 |
| ITF M25 Taipei | 2025/08/27 02:00 | Yunseong Chung v Kuan-Yi Lee | 4-6,7-5,7-6 |
| ITF M25 Taipei | 2025/08/20 02:00 | Soonwoo Kwon v Yunseong Chung | 6-1,6-3 |
| ITF M25 Taipei | 2025/08/18 03:30 | Yunseong Chung v Xiao-Feng Zhou | 6-3,6-2 |
| ITF M15 Nakhon Pathom | 2025/07/30 03:30 | Asahi Harazaki v Yunseong Chung | 6-3,6-2 |
| ITF M15 Nakhon Pathom | 2025/07/24 07:54 | Yunseong Chung v Ryotaro Taguchi | 7-6,5-7,0-3 |