Stadium: Court 2 Round: 25
| ITF Korea F8 | 2016/08/26 03:00 | Young Seok Kim v Ji Sung Nam | 2-6,3-6 |
| ITF Korea F1 | 2018/06/06 02:50 | Young Seok Kim v Jae Hwan Kim | 4-6,4-6 |
| Challenger - Busan | 2018/05/15 02:00 | Young Seok Kim v Marcos Giron | 3-6,3-6 |
| Challenger Gimcheon Qual | 2018/05/06 04:30 | Renta Tokuda v Young Seok Kim | 6-3,6-2 |
| Challenger Gimcheon Qual | 2018/05/05 06:00 | Young Seok Kim v Dong Ju Kim | 6-1,6-3 |
| Challenger - Soul | 2018/05/01 04:35 | Jordan Thompson v Young Seok Kim | 6-1,6-2 |
| ITF Thailand F12 Qual | 2017/12/10 03:00 | Young Seok Kim v Young-Hoon Jeong | 4-6,3-6 |
| ITF Thailand F11 | 2017/12/05 05:05 | Alexey Vatutin v Young Seok Kim | 6-1,3-6,7-6 |
| ITF Thailand F11 Qual | 2017/12/04 03:00 | Young Seok Kim v Dusty H. Boyer | 6-3,6-4 |
| ITF Korea F1 | 2018/06/08 02:00 | Ji Sung Nam v Yong-Kyu Lim | 1-6,2-6 |
| ITF Korea F1 | 2018/06/06 02:15 | Ji Sung Nam v Daniel Yoo | 6-4,6-3 |
| ITF Vietnam F3 | 2018/05/20 03:00 | Ji Sung Nam v Pruchya Isarow | 6-4,6-2 |
| ITF Vietnam F3 | 2018/05/18 03:00 | Ji Hoon Son v Ji Sung Nam | 1-6,2-6 |
| ITF Vietnam F3 | 2018/05/17 03:00 | Ji Sung Nam v Abhinav Sanjeev Shanmugam | 7-6,6-2 |
| ITF Vietnam F3 | 2018/05/16 05:30 | Rio Noguchi v Ji Sung Nam | 3-6,1-6 |
| ITF Vietnam F3 | 2018/05/15 04:55 | Nicholas Bybel v Ji Sung Nam | 4-6,2-6 |
| ITF Vietnam F2 | 2018/05/13 04:00 | Rio Noguchi v Ji Sung Nam | 7-6,6-3 |