Round: 62 Ground: Hardcourt outdoor
| ITF Korea F2 Qual | 2017/06/03 03:00 | Seong-Gook Oh v Jun Sang Park | 4-6,2-6 |
| 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 |
| Challenger Busan Qual | 2017/05/13 05:50 | Yunseong Chung v Seong-Gook Oh | 6-4,6-7,3-6 |
| ITF Korea F8 | 2016/09/03 01:00 | Seon Yong Han v Seong-Gook Oh | 6-4,6-1 |
| ITF Korea F3 Qual | 2017/06/11 04:30 | Jun Sang Park v Woo Young Lee | 6-4,6-3 |
| ITF Korea F2 Qual | 2017/06/05 03:00 | Jun Sang Park v Dong-Hak Sin | 5-7,6-2,0-6 |
| ITF Korea F2 Qual | 2017/06/03 03:00 | Seong-Gook Oh v Jun Sang Park | 4-6,2-6 |
| ITF Korea F1 Qual | 2017/05/28 01:00 | Dong-Kyu Lee v Jun Sang Park | 6-2,7-5 |
| ITF Korea F1 Qual | 2016/06/13 03:00 | Daniel Yoo v Jun Sang Park | 6-2,6-4 |
| ITF Korea F1 | 2015/05/16 05:00 | Jong-Min Choi v Jun Sang Park | 6-2,3-6,7-6 |