Round: 25 Ground: Clay
| ITF - Niederlande F4 | 2018/08/18 11:00 | Kazuki Nishiwaki v Niels Lootsma | 2-6,2-6 |
| ITF - Niederlande F4 | 2018/08/17 09:00 | Kazuki Nishiwaki v Jesper De Jong | 4-3 |
| ITF - Niederlande F4 | 2018/08/16 10:30 | Yannick Mertens v Kazuki Nishiwaki | 3-6,6-7 |
| ITF - Niederlande F4 | 2018/08/15 12:45 | Justin Butsch v Kazuki Nishiwaki | 6-7,0-6 |
| ITF - Indonesien F3 | 2018/08/07 04:50 | Kazuki Nishiwaki v Ajeet Rai | 3-6,6-7 |
| ITF - Hong Kong F1 | 2018/06/25 03:55 | Kazuki Nishiwaki v Makoto Ochi | 7-6,6-2 |
| ITF - Singapur F3 | 2018/05/28 05:00 | Maverick Banes v Kazuki Nishiwaki | 6-7,6-4,7-6 |
| ITF - Singapur F2 | 2018/05/25 03:00 | Kazuki Nishiwaki v Collin Altamirano | 7-5,2-6,3-6 |
| ITF - Niederlande F4 | 2018/08/18 11:00 | Mariano Kestelboim v Alexander Lazov | 3-6,2-6 |
| ITF - Niederlande F4 | 2018/08/17 09:00 | Felipe Mantilla v Alexander Lazov | 1-6,6-4,2-6 |
| ITF - Niederlande F4 | 2018/08/16 08:00 | Leonard Von Hindte v Alexander Lazov | 4-6,4-6 |
| ITF - Niederlande F4 | 2018/08/14 10:00 | George Von Massow v Alexander Lazov | 4-6,3-6 |
| ITF - Österreich F3 | 2018/07/19 09:30 | Michal Konecny v Alexander Lazov | 3-6,4-6 |
| ITF - Österreich F3 | 2018/07/18 10:30 | Bogdan Borza v Alexander Lazov | 1-6,2-6 |
| ITF - Österreich F3 | 2018/07/17 12:00 | Philipp Schroll v Alexander Lazov | 6-7,6-7 |
| ITF - Italien F12 | 2018/05/30 15:30 | Pietro Rondoni v Alexander Lazov | 6-2,7-5 |