Round: 54 Ground: Clay
| ITF Japan F3 | 2017/03/18 06:00 | Shane Vinsant v Yuto Sakai | 6-3,6-2 |
| ITF Japan F3 | 2017/03/18 00:30 | Naru Shirafuji v Yuto Sakai | 3-6,4-6 |
| ITF Japan F1 | 2017/03/05 01:00 | Masaya Kobayashi v Yuto Sakai | 7-6,7-5 |
| ITF Japan F1 | 2017/03/04 03:30 | Yuto Sakai v Yuki Nakamura | 7-6,7-5 |
| ITF Indonesia F3 | 2017/02/22 06:50 | Yutaro Matsuzaki v Yuto Sakai | 6-4,6-4 |
| ITF Indonesia F3 Qual | 2017/02/20 02:30 | Chien Hsun Lo v Yuto Sakai | 1-6,6-1,6-7 |
| ITF Indonesia F3 Qual | 2017/02/19 06:30 | Yuto Sakai v Sherwin Foo | 6-4,6-1 |
| ITF Indonesia F3 Qual | 2017/02/18 02:00 | Maxime Gayte v Yuto Sakai | 4-6,3-6 |
| 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 |
| ITF China F3 Qual | 2017/02/25 03:00 | Kazuki Nishiwaki v Sheng Hao Zhou | 2-6,7-6,7-5 |
| ITF China F2 Qual | 2017/02/18 02:40 | Kazuki Nishiwaki v Jun Nan Tao | 4-6,3-6 |
| Others | 2016/11/05 04:05 | Kazuki Nishiwaki v Kento Takeuchi | 0-6,2-6 |