Round: 26 Ground: Clay
| ITF Japan F8 | 2017/06/14 05:50 | Ryota Kishi v Keisuke Watanuki | 0-6,1-6 |
| ITF Japan F8 | 2017/06/12 00:00 | Keisuke Watanuki v Kazuki Nishiwaki | 6-2,6-2 |
| ITF Japan F8 | 2017/06/10 04:00 | Keisuke Watanuki v Taketo Takamisawa | 4-6,6-2,6-3 |
| ITF Japan F7 | 2017/06/08 01:30 | Keisuke Watanuki v Kento Takeuchi | 3-6,5-7 |
| ITF Japan F6 Qual | 2017/05/29 01:00 | Keisuke Watanuki v Yuto Sakai | 6-7,6-7 |
| ITF Japan F6 Qual | 2017/05/28 07:00 | Keisuke Watanuki v Yuto Sakai | 6-7,6-7 |
| ITF Japan F6 Qual | 2017/05/27 01:00 | Keisuke Watanuki v Sung Min Han | 6-4,6-0 |
| ITF Japan F5 | 2017/04/02 01:00 | Masaki Sasai v Keisuke Watanuki | 6-2,6-4 |
| ITF Japan F8 | 2017/06/14 05:40 | Yuya Ito v Hiroyasu Ehara | 3-6,2-6 |
| ITF Japan F7 | 2017/06/05 04:10 | Hiroyasu Ehara v Shuichi Sekiguchi | 2-6,1-6 |
| ITF Singapore F2 | 2017/05/31 05:25 | Hiroyasu Ehara v Raymond Sarmiento | 2-6,3-6 |
| ITF Singapore F1 | 2017/05/28 05:00 | Dayne Kelly v Hiroyasu Ehara | 3-6,3-6 |
| ITF Singapore F1 | 2017/05/26 03:00 | Sho Katayama v Hiroyasu Ehara | 3-6,6-4,2-6 |
| ITF Singapore F1 | 2017/05/25 02:00 | Hiroyasu Ehara v Masato Shiga | 6-1,6-0 |
| ITF Singapore F1 | 2017/05/23 04:10 | Sem Verbeek v Hiroyasu Ehara | 6-7,1-6 |
| Challenger Gimcheon Qual | 2017/04/29 05:10 | Takuto Niki v Hiroyasu Ehara | 6-1,6-4 |