Estadio: Court 5 Round: 25 Ground: Hardcourt outdoor
| Challenger de Gatineau | 2019/07/16 18:35 | Shintaro Imai v Soonwoo Kwon | 2-6,3-6 |
| Challenger de Gatineau | 2019/07/15 14:50 | Shintaro Imai v Alejandro Tabilo | 6-4,2-6,7-5 |
| Challenger de Winnipeg | 2019/07/10 20:25 | Shintaro Imai v Antoine Hoang | 6-7,5-7 |
| Challenger de Winnipeg | 2019/07/10 15:00 | Jacob Grills v Shintaro Imai | 7-6,6-7,0-6 |
| ITF M25 Hengyang | 2019/06/21 02:00 | Shintaro Imai v Harry Bourchier | 4-6,3-6 |
| ITF M25 Hengyang | 2019/06/20 03:40 | Shintaro Imai v Aliaksandr Liaonenka | 7-5,6-1 |
| ITF M25 Hengyang | 2019/06/19 04:35 | Shintaro Imai v Li-Wei Tan | 6-4,6-0 |
| ITF M25 Hong Kong | 2019/06/16 02:00 | Agustin Velotti v Shintaro Imai | 6-3,6-3 |
| ITF M25 Nonthaburi | 2019/07/23 05:25 | Seong-Gook Oh v Vladyslav Orlov | 6-7,3-6 |
| ITF M15 Anseong | 2019/06/28 02:45 | Thomas Fancutt v Seong-Gook Oh | 7-6,7-6 |
| ITF M15 Anseong | 2019/06/27 01:00 | Oh-Hee Kwon v Seong-Gook Oh | 2-6,2-6 |
| ITF M15 Anseong | 2019/06/25 05:05 | Hyeon il Jung v Seong-Gook Oh | 1-6,0-6 |
| ITF M15 Gimcheon | 2019/06/18 05:45 | Sanhui Shin v Seong-Gook Oh | 6-1,6-4 |
| ITF M15 Gimcheon | 2019/06/13 01:30 | Seong-Gook Oh v Sung Jun Park | 6-1,5-7,4-6 |
| ITF M15 Gimcheon | 2019/06/12 03:20 | Seong-Gook Oh v Seita Watanabe | 6-7,6-2,6-3 |
| ITF M15 Daegu | 2019/06/08 04:30 | Seong-Gook Oh v Seong Chan Hong | 1-6,2-6 |