Stadium: Ct 2 Round: 26 Ground: Hardcourt outdoor
| ITF Australia F7 | 2018/10/02 00:00 | Colin Sinclair v Dane Sweeny | 6-4,6-4 |
| ITF Tunisia F31 | 2018/09/16 09:00 | Colin Sinclair v Gabriel Petit | 6-7,6-7 |
| ITF Tunisia F31 | 2018/09/15 11:05 | Alexis Klegou v Colin Sinclair | 5-7,6-7 |
| ITF Tunisia F31 | 2018/09/14 09:50 | Andrea Borroni v Colin Sinclair | 5-7,4-6 |
| ITF Belgium F10 | 2018/09/01 12:30 | Colin Sinclair v Michael Geerts | 3-6,3-6 |
| ITF Belgium F10 | 2018/08/31 11:00 | Colin Sinclair v Maxime Pauwels | 6-2,7-6 |
| ITF Belgium F10 | 2018/08/30 09:00 | Jonas Merckx v Colin Sinclair | 2-6,6-4,1-6 |
| ITF Belgium F10 | 2018/08/29 12:15 | Samuel Brosset v Colin Sinclair | 6-4,1-6,2-6 |
| 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 |