Kengo Sasaki
| ITF M15 Karuizawa | 05/27 04:00 | 45 | Jake Delaney v Kengo Sasaki | 6-4,6-4 | |
| Challenger Yokohama | 02/25 01:00 | 166 |
Chun Hsin Tseng
v
Kengo Sasaki |
6-1,6-3 | |
| ITF Japan F7 Qual | 06/03 02:30 | 54 | Takuya Kaneko v Kengo Sasaki | 6-4,2-6,6-2 | |
| ITF Japan F7 Qual | 06/02 01:00 | 54 | Kengo Sasaki v Takahiro Kubo | 6-1,6-1 | |
| Challenger Yokohama Qual | 02/24 02:45 | 45 | Kengo Sasaki v Teppei Uesugi | 2-6,7-6,6-7 |