Stadium: Centre Court Round: 28
| ITF Korea F4 | 2018/08/17 01:00 | Oh, Seong-Gook v Hovhannisyan, Mousheg | 4-6,6-4,6-2 |
| ITF Korea F4 | 2018/08/16 01:00 | Oh, Seong-Gook v Kwon, OH-Hee | 6-4,6-4 |
| ITF Malaysia F2 | 2018/07/10 03:50 | Purcell, Rhett v Oh, Seong-Gook | 7-6,7-5 |
| ITF Malaysia F1 | 2018/07/04 03:30 | Moritani, Soichiro v Oh, Seong-Gook | 6-4,6-0 |
| ITF Malaysia F1 | 2018/07/03 10:05 | Oh, Seong-Gook v Noh, Sang-Woo | 7-6,6-2 |
| ITF Korea F3 | 2018/06/18 03:30 | Oh, Seong-Gook v Hong, Seong Chan | 6-7,0-6 |
| ITF Korea F2 | 2018/06/13 03:05 | Oh, Seong-Gook v Wang, Chukang | 6-1,5-7,7-5 |
| ITF Korea F1 | 2018/06/05 01:00 | Oh, Seong-Gook v Choi, Jae-Won | 1-6,5-7 |
| ITF Korea F4 | 2018/08/17 01:00 | Park, Uisung v Lee, Tae-Woo | 6-2,6-4 |
| ITF Korea F4 | 2018/08/16 03:05 | Lee, Young Seok v Park, Uisung | 2-6,0-6 |
| ITF Korea F4 | 2018/08/14 01:00 | Alexander Babanine v Park, Uisung | 6-4,6-7,1-6 |
| ITF Korea F4 | 2018/08/13 01:00 | Park, Uisung v Yoo, Daniel | 6-2,1-6,7-6 |
| Challenger Gimcheon | 2018/05/07 08:15 | Park, Uisung v Yusuke Takahashi | 5-7,2-6 |
| Challenger Seoul | 2018/04/30 04:45 | Mackenzie McDonald v Park, Uisung | 7-5,6-2 |
| ITF USA F9 | 2018/04/03 14:00 | Park, Uisung v Bourchier, Harry | 5-7,1-6 |
| ITF Korea F8 | 2016/08/22 06:55 | Kim, Young Seok v Park, Uisung | 7-5,6-4 |