Round: 62 Ground: Hardcourt outdoor
| ITF Japan F3 | 2017/03/18 00:30 | 니시와키, 카즈키 v Itsusaki, Kaito | 6-3,6-4 |
| ITF China F3 Qual | 2017/02/26 03:40 | Tao, Jun Nan v 니시와키, 카즈키 | 6-3,6-2 |
| ITF China F3 Qual | 2017/02/25 03:00 | 니시와키, 카즈키 v 저우, 성하우 | 2-6,7-6,7-5 |
| ITF China F2 Qual | 2017/02/18 02:40 | 니시와키, 카즈키 v Tao, Jun Nan | 4-6,3-6 |
| Others | 2016/11/05 04:05 | 니시와키, 카즈키 v Takeuchi, Kento (1987) | 0-6,2-6 |
| ITF Japan F8 | 2016/06/16 02:50 | 키쿠치, 겐고 v 니시와키, 카즈키 | 7-6,6-4 |
| ITF Japan F8 | 2016/06/15 04:30 | 니시와키, 카즈키 v Oku, Hiromasa | 2-6,6-3,6-4 |
| ITF Japan F4 | 2015/03/28 00:30 | Matsuzaki, Yutaro v 니시와키, 카즈키 | 6-7,6-4,6-4 |
| ITF Japan F3 | 2017/03/18 00:30 | Otsuka, Yohei v Cao, Zhaoyi | 1-6,3-6 |
| ITF Japan F2 | 2017/03/14 05:30 | Cao, Zhaoyi v 충, 훙 | 6-7,6-7 |
| ITF Japan F1 | 2017/03/06 01:00 | Cao, Zhaoyi v Sasai, Masaki | 0-6,1-6 |
| ITF Japan F1 | 2017/03/05 01:00 | Cao, Zhaoyi v 시미즈, 카즈키 | 2-6,6-2,7-5 |
| Yokohama, Japan, Qualifying | 2017/02/25 06:40 | 볼트, 알렉스 v Cao, Zhaoyi | 6-3,6-4 |
| ITF China F1 Qual | 2017/02/14 02:00 | Cao, Zhaoyi v Zhong, Su Hao | 4-6,7-5,4-6 |
| ITF China F1 Qual | 2017/02/13 02:00 | Cao, Zhaoyi v 바크호둘, 파리두니 | 6-4,6-2 |
| ITF China F1 Qual | 2017/02/12 05:25 | Cao, Zhaoyi v 첸, 리란 | 6-4,6-1 |