Stadium: Court 1 Round: 25 Ground: Hardcourt indoor
| Challenger Gwangju | 2022/10/04 05:30 | Yunseong Chung v Ji Sung Nam | 6-1,3-6,5-7 |
| Challenger Columbus | 2021/09/21 14:00 | Yunseong Chung v Ji Sung Nam | 6-3,4-6,6-7 |
| ITF Korea F3 | 2018/06/24 05:00 | Yunseong Chung v Ji Sung Nam | 6-1,6-3 |
| ITF Korea F2 | 2018/06/17 04:00 | Ji Sung Nam v Yunseong Chung | 4-6,3-6 |
| Challenger Taipei | 2024/05/14 02:00 | Kaito Uesugi v Ji Sung Nam | 6-4,0-6,2-6 |
| Challenger Taipei | 2024/05/12 06:40 | Ji Sung Nam v Shintaro Imai | 2-6,6-3,6-3 |
| Challenger Gwangju | 2024/04/17 02:00 | Alibek Kachmazov v Ji Sung Nam | 6-4,6-3 |
| Challenger Gwangju | 2024/04/16 02:00 | Ji Sung Nam v Otto Virtanen | 6-4,6-3 |
| Challenger Busan | 2024/04/08 04:30 | Philip Sekulic v Ji Sung Nam | 6-1,6-4 |
| ITF M15 Kashiwa | 2024/04/04 01:25 | Ji Sung Nam v Masamichi Imamura | 3-6,4-6 |
| ITF M15 Kashiwa | 2024/04/02 01:00 | Ji Sung Nam v Takuya Kumasaka | 7-6,3-6,6-4 |
| ITF M25 Mildura | 2024/03/12 02:05 | Alex Bolt v Ji Sung Nam | 7-6,6-2 |
| Challenger Gwangju | 2024/04/18 02:00 | Lloyd Harris v Yunseong Chung | 6-4,6-4 |
| Challenger Gwangju | 2024/04/16 03:15 | Yunseong Chung v Paul Jubb | 6-4,4-6,6-3 |
| Challenger Busan | 2024/04/09 05:30 | Yunseong Chung v Mark Lajal | 3-6,2-6 |
| Challenger Busan | 2024/04/08 02:30 | Hiroki Moriya v Yunseong Chung | 4-6,6-7 |
| Challenger Busan | 2024/04/07 05:15 | Stefanos Sakellaridis v Yunseong Chung | 6-1,2-6,3-6 |
| ITF M15 Tsukuba | 2024/03/29 06:45 | Yunseong Chung v Hikaru Shiraishi | 6-2,4-6,4-6 |
| ITF M15 Tsukuba | 2024/03/28 01:30 | Yunseong Chung v Takuya Kumasaka | 7-6,1-6,6-4 |
| ITF M15 Tsukuba | 2024/03/27 00:55 | Yunseong Chung v Yu Tanaka | 6-3,7-6 |