Round: 27 Ground: Hardcourt outdoor
| ITF Japan F4 | 2018/03/29 03:45 | Renta Tokuda v Yuta Shimizu | 6-3,6-1 |
| ITF Japan F4 | 2018/03/27 04:20 | Renta Tokuda v Naoki Nakagawa | 6-2,6-2 |
| Challenger Qujing Qual | 2018/03/18 03:00 | Renta Tokuda v Podzus, Martins | 7-6,6-7,3-6 |
| Shenzhen, China, Qualifying | 2018/03/12 04:45 | Jason Kubler v Renta Tokuda | 6-1,7-6 |
| Shenzhen, China, Qualifying | 2018/03/11 03:10 | Toshihide Matsui v Renta Tokuda | 2-6,3-6 |
| Challenger Zhuhai Qual | 2018/03/05 02:00 | Yusuke Takahashi v Renta Tokuda | 6-4,6-4 |
| Challenger Zhuhai Qual | 2018/03/04 04:35 | Zelenay, Igor v Renta Tokuda | 6-7,3-6 |
| Challenger Zhuhai Qual | 2018/03/03 04:50 | Gao, Xin v Renta Tokuda | 3-6,1-6 |
| ITF Japan F4 | 2018/03/29 01:00 | Wang, Chuhan v Grills, Jacob | 6-2,3-6,4-6 |
| ITF Japan F4 | 2018/03/27 01:00 | Grills, Jacob v Sekiguchi, Shuichi | 7-6,4-6,6-3 |
| Challenger Qujing Qual | 2018/03/17 02:00 | Wang, Ruixuan v Grills, Jacob | 3-6,7-6,6-2 |
| Shenzhen, China, Qualifying | 2018/03/11 02:45 | Grills, Jacob v Yusuke Takahashi | 4-6,6-4,2-6 |
| Challenger Zhuhai Qual | 2018/03/04 03:45 | Grills, Jacob v Granollers, Gerard | 2-6,6-4,2-6 |
| Challenger Zhuhai Qual | 2018/03/03 05:20 | Grills, Jacob v Jie Cui | 6-4,7-6 |
| Launceston, Australia | 2018/02/04 02:00 | Mitchell, Benjamin v Grills, Jacob | 7-5,6-3 |
| Launceston, Australia | 2018/02/03 02:20 | Benjamin Cawston v Grills, Jacob | 0-6,1-6 |