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