Stadium: Court 5 Round: 25
| Challenger Taipei Qual | 2018/04/09 03:00 | Ruan Roelofse v Jacob Grills | 6-4,2-6,7-6 |
| Challenger Taipei Qual | 2018/04/08 03:00 | Cheng-Yu Yu v Jacob Grills | 6-4,5-7,3-6 |
| Challenger Taipei Qual | 2018/04/07 02:00 | Jacob Grills v Yunseong Chung | 6-3,2-6,6-2 |
| ITF Japan F5 | 2018/04/02 03:10 | Shintaro Imai v Jacob Grills | 6-1,6-1 |
| ITF Japan F4 | 2018/03/30 01:00 | Renta Tokuda v Jacob Grills | 6-3,6-2 |
| ITF Japan F4 | 2018/03/29 01:00 | Chuhan Wang v Jacob Grills | 6-2,3-6,4-6 |
| ITF Japan F4 | 2018/03/27 01:00 | Jacob Grills v Shuichi Sekiguchi | 7-6,4-6,6-3 |
| Challenger Qujing Qual | 2018/03/17 02:00 | Rui-Xuan Wang v Jacob Grills | 3-6,7-6,6-2 |
| ITF Japan F6 Qual | 2018/04/09 02:50 | Kazuki Nishiwaki v Arata Onozawa | 7-5,6-3 |
| ITF Japan F6 Qual | 2018/04/08 04:00 | Rio Noguchi v Kazuki Nishiwaki | 6-2,6-7,0-6 |
| ITF Japan F6 Qual | 2018/04/07 01:00 | Tamaki Yamao v Kazuki Nishiwaki | 6-4,3-6,3-6 |
| ITF Egypt F10 | 2018/03/21 10:00 | Kazuki Nishiwaki v Benjamin Lock | 6-7,4-6 |
| ITF Egypt F10 | 2018/03/19 08:00 | Michel Vernier v Kazuki Nishiwaki | 3-6,2-6 |
| ITF Egypt F10 | 2018/03/18 12:00 | Bruno Britez v Kazuki Nishiwaki | 6-7,2-6 |
| ITF Egypt F10 | 2018/03/17 14:30 | Kazuki Nishiwaki v Anton Chekhov | 6-2,6-2 |
| ITF Egypt F9 | 2018/03/15 10:30 | Benjamin Lock v Kazuki Nishiwaki | 6-2,6-3 |