Stadium: Court 3 Round: 26 Ground: Hardcourt outdoor
| ITF China F1 | 2018/01/08 03:05 | Oh, Seong-Gook v Li, Yuanfeng | 7-6,6-2 |
| Challenger Toyota Qual | 2017/11/11 00:30 | Oh, Seong-Gook v Kibi, Yuya | 3-6,1-6 |
| ITF India F8 | 2017/09/15 04:30 | Oh, Seong-Gook v van Beem, Colin | 6-7,6-1,4-6 |
| ITF India F8 | 2017/09/14 05:00 | Oh, Seong-Gook v Larriere, Clement | 6-0,1-6,6-4 |
| ITF India F8 | 2017/09/13 07:00 | Hung, Jui-Chen v Oh, Seong-Gook | 2-6,2-6 |
| ITF India F8 | 2017/09/11 08:25 | Oh, Seong-Gook v S D Prajwal Dev | 2-6,6-4,6-1 |
| ITF India F7 | 2017/09/06 04:00 | Pungliya, Jayesh v Oh, Seong-Gook | 7-5,7-6 |
| ITF India F7 | 2017/09/05 05:55 | Oh, Seong-Gook v Dzhavakian, Yurii | 6-0,6-1 |
| ITF China F1 | 2018/01/09 05:15 | Xia, Zihao v Shinji Hazawa | 4-6,3-6 |
| Challenger Kobe Qual | 2017/11/04 02:00 | Max Purcell v Shinji Hazawa | 7-6,6-2 |
| ITF Thailand F8 | 2017/10/12 04:40 | Lo, Chien Hsun v Shinji Hazawa | 6-2,6-2 |
| ITF Thailand F8 | 2017/10/11 06:15 | Shinji Hazawa v Takeuchi, Kento (1987) | 6-3,6-1 |
| ITF Thailand F8 | 2017/10/10 05:05 | Shinji Hazawa v Thanapet Chanta | 6-3,6-4 |
| ITF Thailand F8 Qual | 2017/10/09 03:20 | Shinji Hazawa v Moritani, Soichiro | 6-4,6-1 |
| ITF Thailand F8 Qual | 2017/10/08 07:35 | Song, Min-Kyu v Shinji Hazawa | 5-7,1-6 |
| ITF Thailand F8 Qual | 2017/10/07 03:00 | Yeung, Pak Long v Shinji Hazawa | 6-7,1-6 |