Stadium: Court 3 Round: 62 Ground: Clay
| ITF - M25 Anseong | 2023/06/18 05:15 | Junhyun Lee v Young Seok Kim | 2-6,3-6 |
| ITF - M25 Changwon | 2023/06/12 02:45 | Jungwoong Na v Young Seok Kim | 6-2,6-2 |
| ITF - M25 Changwon | 2023/06/11 08:35 | Young Seok Kim v Hyeondeok Yoon | 6-2,6-4 |
| ITF - M25 Daegu | 2023/06/04 01:00 | Jake Delaney v Young Seok Kim | 6-2,4-6,12-10 |
| Challenger - Busan | 2023/05/07 08:45 | Yasutaka Uchiyama v Young Seok Kim | 6-3,6-1 |
| Challenger - Soul | 2023/04/23 04:30 | Yasutaka Uchiyama v Young Seok Kim | 6-1,6-0 |
| ITF - M15 - Antalya | 2023/04/12 11:00 | Young Seok Kim v Maxime Chazal | 4-6,3-6 |
| ITF - M15 Nonthaburi | 2019/12/02 04:30 | Pol Wattanakul v Young Seok Kim | 6-3,6-4 |
| ITF - M25 Anseong | 2023/06/18 07:05 | Byeonghun Kim v David Kim | 7-6,2-6,10-8 |
| ITF - M25 Changwon | 2023/06/12 01:00 | Byeonghun Kim v Suk Hyun Choo | 4-6,2-6 |
| ITF - M25 Changwon | 2023/06/11 02:30 | Woodam Song v Byeonghun Kim | 4-6,1-6 |
| ITF - M25 Daegu | 2023/06/05 02:50 | Dong Ju Kim v Byeonghun Kim | 6-2,6-2 |
| ITF - M25 Daegu | 2023/06/04 01:00 | Byeonghun Kim v Yongchi Bak | 6-1,7-6 |
| ITF Korea F5 | 2018/08/20 01:00 | Woo Hyeok Jang v Byeonghun Kim | 6-1,6-2 |
| ITF Korea F4 | 2018/08/11 01:00 | Seong Jae Han v Byeonghun Kim | 6-2,4-6,6-3 |
| ITF Korea F3 Qual | 2018/06/16 03:30 | Sanhui Shin v Byeonghun Kim | 6-2,6-0 |