Round: 62 Ground: Clay
| ITF Japan F5 | 2017/04/02 01:00 | Masaki Sasai v Keisuke Watanuki | 6-2,6-4 |
| ITF Japan F5 | 2017/04/01 02:00 | Takashi Yasugami v Keisuke Watanuki | 4-6,6-2,5-7 |
| ITF Japan F4 | 2017/03/28 01:00 | Masaya Kobayashi v Keisuke Watanuki | 6-3,6-2 |
| ITF Japan F4 | 2017/03/27 01:00 | Yuga Tashiro v Keisuke Watanuki | 2-6,6-7 |
| ITF Japan F4 | 2017/03/25 03:00 | Yu Chang v Keisuke Watanuki | 7-6,3-6,4-6 |
| ITF Japan F2 | 2017/03/14 04:20 | Yusuke Takahashi v Keisuke Watanuki | 6-2,6-2 |
| ITF Japan F2 | 2017/03/13 01:00 | Kittiphong Wachiramanowong v Keisuke Watanuki | 4-6,6-7 |
| ITF Japan F2 | 2017/03/12 02:00 | Keisuke Watanuki v Shinta Fujii | 6-2,2-6,6-2 |
| ITF Japan F5 | 2017/04/03 05:00 | Kazuki Nishiwaki v Tung-Lin Wu | 3-6,5-7 |
| ITF Japan F5 | 2017/04/02 01:00 | Tomohiro Masabayashi v Kazuki Nishiwaki | 1-6,6-7 |
| ITF Japan F5 | 2017/04/01 01:00 | Yuto Sakai v Kazuki Nishiwaki | 2-6,6-7 |
| ITF Japan F4 | 2017/03/25 02:00 | Yuki Matsuo v Kazuki Nishiwaki | 5-7,7-6,6-3 |
| ITF Japan F3 | 2017/03/19 01:00 | Sho Shimabukuro v Kazuki Nishiwaki | 6-3,7-5 |
| ITF Japan F3 | 2017/03/18 08:00 | Kazuki Nishiwaki v Zhaoyi Cao | 6-3,6-0 |
| ITF Japan F3 | 2017/03/18 00:30 | Kazuki Nishiwaki v Kaito Itsusaki | 6-3,6-4 |
| ITF China F3 Qual | 2017/02/26 03:40 | Jun Nan Tao v Kazuki Nishiwaki | 6-3,6-2 |