Round: 44 Ground: Hardcourt outdoor
| 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 Guam F1 | 2016/05/23 02:25 | Seong-Gook Oh v Ren Nakamura | 6-4,6-4 |
| ITF Guam F1 | 2016/05/22 00:00 | Seong-Gook Oh v Kennosuke Nouchi | 6-4,6-1 |
| ITF China F6 Qual | 2016/05/09 02:00 | Yusuke Takahashi v Seong-Gook Oh | 6-1,6-4 |
| ITF Korea F1 Qual | 2017/05/27 03:30 | Woo-Ram Kim v In Kyo Jeong | 5-7,7-6,6-0 |
| ITF Vietnam F8 | 2016/09/24 04:00 | Sora Fukuda v Woo-Ram Kim | 6-3,6-2 |
| ITF Vietnam F5 | 2016/09/20 07:35 | Joel Cannell v Woo-Ram Kim | 6-4,6-1 |
| ITF Vietnam F8 | 2016/09/18 03:00 | Woo-Ram Kim v Ken Onoda | 6-4,6-4 |
| ITF Vietnam F8 | 2016/09/18 02:00 | Marek Gengel v Woo-Ram Kim | 1-6,2-6 |
| ITF Vietnam F8 | 2016/09/17 03:00 | Roy Hobbs v Woo-Ram Kim | 4-6,3-6 |
| ITF Vietnam F4 | 2016/09/11 04:00 | Shinta Fujii v Woo-Ram Kim | 6-7,6-3,6-0 |
| ITF Vietnam F4 | 2016/09/10 03:00 | Daisuke Sumizawa v Woo-Ram Kim | 3-6,2-6 |