Stadium: Court 4 Round: 25 Ground: Hardcourt outdoor
| ITF Vietnam F5 | 2018/11/01 04:30 | Filip Bergevi v Seong-Gook Oh | 6-7,6-2,6-2 |
| ITF Vietnam F5 | 2018/10/31 03:00 | Seong-Gook Oh v Grigoriy Lomakin | 6-3,2-6,6-4 |
| ITF Vietnam F4 | 2018/10/23 03:40 | Rio Noguchi v Seong-Gook Oh | 6-3,6-2 |
| ITF Korea F6 | 2018/09/01 04:00 | Seong-Gook Oh v Min-Kyu Song | 1-6,6-7 |
| ITF Korea F6 | 2018/08/31 03:00 | Young Seok Kim v Seong-Gook Oh | 5-7,6-2,4-6 |
| ITF Korea F6 | 2018/08/30 03:00 | Oh-Hee Kwon v Seong-Gook Oh | 4-6,1-6 |
| ITF Korea F6 | 2018/08/28 02:00 | William Ma v Seong-Gook Oh | 6-4,2-6,0-6 |
| ITF Korea F4 | 2018/08/19 03:15 | Jae Hwan Kim v Seong-Gook Oh | 6-3,3-6,4-6 |
| ITF - Daegu M15 | 2019/06/04 02:55 | Hyung-Chan Lim v Sung Jun Park | 6-0,2-6,10-12 |
| ITF - Daegu M15 | 2019/06/03 01:00 | Sung Jun Park v Seoung Hun Lee | 6-2,6-0 |
| ITF Korea F6 | 2018/08/26 03:00 | Sung Jun Park v Seungri Choi | 6-1,5-7,2-6 |
| ITF Korea F6 | 2018/08/25 04:30 | Gwang Hyeon Cho v Sung Jun Park | 7-6,4-6,2-6 |
| ITF Korea F5 | 2018/08/20 01:00 | Sung Jun Park v Ku Keon Kang | 3-6,1-6 |
| ITF Korea F5 | 2018/08/19 02:00 | Sung Jun Park v Cheong Hwi Kim | 6-0,6-2 |
| ITF Korea F5 | 2018/08/18 03:00 | Ang Ji v Sung Jun Park | 1-6,3-6 |
| Challenger Gwangju Qual | 2018/08/11 03:20 | Woo Hyeok Jang v Sung Jun Park | 6-4,6-3 |