Stadium: Court 17 Round: 25 Ground: Hardcourt outdoor
| ITF M15 Daegu | 2019/06/08 04:30 | Seong-Gook Oh v Seong Chan Hong | 1-6,2-6 |
| ITF M15 Daegu | 2019/06/08 01:00 | Seong-Gook Oh v Young Seok Kim | 6-2,6-2 |
| ITF M15 Daegu | 2019/06/06 03:40 | Seong-Gook Oh v Yeongseok Jeong | 6-1,6-2 |
| ITF M15 Daegu | 2019/06/05 04:50 | Seong-Gook Oh v Sung Jun Park | 6-4,6-7,7-5 |
| 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 M15 Gimcheon | 2019/06/11 02:50 | Seita Watanabe v Hyung-Chan Lim | 6-4,6-0 |
| ITF M15 Gimcheon | 2019/06/10 02:00 | Seita Watanabe v Jin Sung Han | 6-1,6-2 |
| ITF M15 Daegu | 2019/06/06 02:00 | Jung-Woong Na v Seita Watanabe | 6-3,6-2 |
| ITF M15 Daegu | 2019/06/05 03:55 | Seita Watanabe v Issei Okamura | 6-4,7-6 |
| ITF M15 Daegu | 2019/06/04 02:20 | Seita Watanabe v Seung-Hun Shin | 6-0,6-1 |
| ITF M15 Daegu | 2019/06/03 05:00 | Seita Watanabe v Dae-Hee Lee | 6-2,6-0 |
| ITF M15 Tabarka | 2019/05/16 10:30 | Manuel Guinard v Seita Watanabe | 6-3,6-1 |
| ITF M15 Tabarka | 2019/05/15 08:00 | Seita Watanabe v Roman Blokhin | 6-1,6-0 |