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 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 Japan F7 Qual | 2016/06/04 01:00 | Yuga Tashiro v Seong-Gook Oh | 6-2,6-2 |
| ITF Guam F1 | 2016/05/25 01:35 | Seong-Gook Oh v Sho Katayama | 4-6,1-6 |
| ITF Korea F2 Qual | 2017/06/05 03:00 | Sang Yeop Kim v In Kyo Jeong | 6-4,6-2 |
| ITF Korea F2 Qual | 2017/06/04 04:30 | Yu-Seob Kim v In Kyo Jeong | 3-6,5-7 |
| ITF Korea F2 Qual | 2017/06/03 03:00 | In Kyo Jeong v Ho-Min Kang | 6-1,6-2 |
| ITF Korea F1 Qual | 2017/05/27 03:30 | Woo-Ram Kim v In Kyo Jeong | 5-7,7-6,6-0 |
| ITF Korea F1 Qual | 2016/06/11 01:00 | In Kyo Jeong v Sung Hun Kim | 3-6,6-4,3-6 |