| ITF Japan F8 | 2017/06/15 02:30 | Watanuki, Keisuke v 江原 弘泰 | 1-6,3-6 |
| ITF Japan F8 | 2017/06/14 05:50 | Kishi, Ryota v Watanuki, Keisuke | 0-6,1-6 |
| ITF Japan F8 | 2017/06/12 00:00 | Watanuki, Keisuke v 西脇 一樹 | 6-2,6-2 |
| ITF Japan F8 | 2017/06/10 04:00 | Watanuki, Keisuke v 高見澤 岳飛 | 4-6,6-2,6-3 |
| ITF Japan F7 | 2017/06/08 01:30 | Watanuki, Keisuke v 竹内 研人 | 3-6,5-7 |
| ITF Japan F6 Qual | 2017/05/29 01:00 | Watanuki, Keisuke v サカイ,ユウト | 6-7,6-7 |
| ITF Japan F6 Qual | 2017/05/28 07:00 | Watanuki, Keisuke v サカイ,ユウト | 6-7,6-7 |
| ITF Japan F6 Qual | 2017/05/27 01:00 | Watanuki, Keisuke v Han, Sung Min | 6-4,6-0 |