| ITF Korea F3 | 2017/06/14 01:00 | Seong-Gook Oh v Tae-Woo Lee | 2-6,4-6 |
| ITF Korea F3 Qual | 2017/06/12 03:00 | Seong-Gook Oh v Jun Sang Park | 7-5,7-6 |
| ITF Korea F3 Qual | 2017/06/11 04:30 | Seong-Gook Oh v A-Ram Kim | 6-3,6-1 |
| ITF Korea F3 Qual | 2017/06/10 03:00 | Seong-Gook Oh v In Kyo Jeong | 6-3,6-4 |
| ITF Korea F2 Qual | 2017/06/03 03:00 | Seong-Gook Oh v Jun Sang Park | 4-6,2-6 |
| ITF Korea F1 Qual | 2017/05/29 04:20 | Seong-Gook Oh v Woo Hyeok Jang | 2-6,3-6 |
| ITF Korea F1 Qual | 2017/05/28 06:30 | Seong-Gook Oh v Woo-Ram Kim | 6-1,6-4 |
| Challenger Busan Qual | 2017/05/14 03:50 | Takuto Niki v Seong-Gook Oh | 6-4,6-3 |
| ITF Korea F4 | 2017/06/17 03:00 | Rishabdev Raman v Dong Woon Kang | 2-6,3-6 |
| ITF Korea F1 Qual | 2016/06/12 02:00 | Seungri Choi v Dong Woon Kang | 6-3,6-2 |
| ITF Korea F1 Qual | 2016/06/11 01:00 | Dong Woon Kang v Gwang Hyeon Cho | 6-1,6-2 |