Home History
| ITF Australia F7 | 2018/10/02 01:45 | Connor Johnson v Kazuki Nishiwaki | 3-6,3-6 |
| Challenger Shanghai | 2018/09/08 05:00 | Aldin Setkic v Kazuki Nishiwaki | 6-3,6-2 |
| ITF Netherlands F6 | 2018/08/28 08:30 | Kazuki Nishiwaki v Kevin Kaczynski | 2-6,3-6 |
| ITF Netherlands F5 | 2018/08/21 08:00 | Kazuki Nishiwaki v Alexander Lazov | 6-0,2-6,1-6 |
| ITF Netherlands F4 | 2018/08/18 11:00 | Kazuki Nishiwaki v Niels Lootsma | 2-6,2-6 |
| ITF Netherlands F4 | 2018/08/17 09:00 | Kazuki Nishiwaki v Jesper De Jong | 4-3 |
| ITF Netherlands F4 | 2018/08/16 10:30 | Yannick Mertens v Kazuki Nishiwaki | 3-6,6-7 |
| ITF Netherlands F4 | 2018/08/15 12:45 | Justin Butsch v Kazuki Nishiwaki | 6-7,0-6 |
Away History
| ITF Thailand F5 | 2018/09/29 04:30 | Tianjia Guo v Kousuke Ogura | 6-4,2-6,3-6 |
| ITF Thailand F4 | 2018/09/22 02:30 | Tianjia Guo v Suthinan Tanthaseraneewat | 4-6,1-6 |
| ITF China F12 Qual | 2018/08/12 02:00 | Tianjia Guo v Vignesh Peranamallur | 2-6,1-6 |
| ITF China F10 Qual | 2018/07/07 02:00 | Owen Lu v Tianjia Guo | 3-6,6-2,6-4 |
| ITF China F7 | 2018/05/29 03:35 | Natthasith Kunsuwan v Tianjia Guo | 6-1,6-3 |
| ITF China F7 Qual | 2018/05/28 02:00 | Tianjia Guo v Jianhui Li | 1-6,2-6 |
| ITF China F7 Qual | 2018/05/27 02:00 | Tianjia Guo v Ritesh Dubey | 6-0,6-0 |
| ITF China F6 Qual | 2018/05/13 04:15 | Tianjia Guo v Xinmu Zhou | 2-6,2-6 |