Stadium: Court 7 Round: 25
| ITF Korea F1 | 2018/06/05 01:00 | Seong-Gook Oh v Jae-Won Choi | 1-6,5-7 |
| Challenger Busan Qual | 2018/05/12 02:15 | Jeamoon Lee v Seong-Gook Oh | 7-6,6-3 |
| Challenger Seoul Qual | 2018/04/28 02:50 | Ji Hoon Son v Seong-Gook Oh | 6-3,6-3 |
| ITF China F1 | 2018/01/11 02:30 | Seong-Gook Oh v Shinji Hazawa | 3-6,4-6 |
| ITF China F1 | 2018/01/08 03:05 | Seong-Gook Oh v Yuanfeng Li | 7-6,6-2 |
| Challenger Toyota Qual | 2017/11/11 00:30 | Seong-Gook Oh v Yuya Kibi | 3-6,1-6 |
| ITF India F8 | 2017/09/15 04:30 | Seong-Gook Oh v Colin Van Beem | 6-7,6-1,4-6 |
| ITF India F8 | 2017/09/14 05:00 | Seong-Gook Oh v Clement Larriere | 6-0,1-6,6-4 |
| ITF Korea F2 | 2018/06/11 05:00 | Chukang Wang v Jin Sung Han | 7-6,6-2 |
| ITF Korea F2 | 2018/06/10 06:30 | Chukang Wang v Jeong Heon Lee | 2-6,6-3,6-0 |
| ITF China F8 | 2018/06/05 05:00 | Bang Shuo Yin v Chukang Wang | 6-3,3-6,6-3 |
| ITF China F7 | 2018/05/29 02:00 | Chukang Wang v Kento Takeuchi | 3-6,2-6 |
| ITF China F6 | 2018/05/15 02:00 | Shintaro Imai v Chukang Wang | 6-3,6-2 |
| ITF China F6 Qual | 2018/05/14 03:00 | Chukang Wang v Zijiang Yang | 7-5,6-2 |
| ITF China F6 Qual | 2018/05/13 03:00 | Chukang Wang v Zhao Zhao | 6-3,6-1 |
| ITF China F5 | 2018/05/10 04:35 | Chien Hsun Lo v Chukang Wang | 7-5,6-4 |