Stadium: Court 4 Round: 25 Ground: Clay
| ITF Hong Kong F3 | 2017/07/08 01:30 | Jacob Grills v Shintaro Imai | 6-7,3-6 |
| ITF Japan F3 | 2018/03/22 05:25 | Kaito Uesugi v Shintaro Imai | 6-3,2-6,6-1 |
| ITF Japan F3 | 2018/03/19 04:30 | Rio Noguchi v Shintaro Imai | 6-7,4-6 |
| ITF Japan F2 | 2018/03/17 02:00 | Shintaro Imai v Tung-Lin Wu | 5-7,0-6 |
| ITF Japan F2 | 2018/03/16 01:00 | Soichiro Moritani v Shintaro Imai | 2-6,5-7 |
| ITF Japan F2 | 2018/03/14 01:00 | Rio Noguchi v Shintaro Imai | 3-6,3-6 |
| ITF Japan F2 | 2018/03/13 02:10 | Cheng-Yu Yu v Shintaro Imai | 7-6,3-6,2-6 |
| ITF Japan F1 | 2018/03/06 02:00 | Shintaro Imai v Sho Katayama | 2-6,5-7 |
| Challenger Yokohama Qual | 2018/02/24 01:00 | Maverick Banes v Shintaro Imai | 7-6,1-6,7-6 |
| Challenger Qujing Qual | 2018/03/17 02:00 | Rui-Xuan Wang v Jacob Grills | 3-6,7-6,6-2 |
| Challenger Shenzhen Qual | 2018/03/11 02:45 | Jacob Grills v Yusuke Takahashi | 4-6,6-4,2-6 |
| Challenger Zhuhai Qual | 2018/03/04 03:45 | Jacob Grills v Gerard Granollers-Pujol | 2-6,6-4,2-6 |
| Challenger Zhuhai Qual | 2018/03/03 05:20 | Jacob Grills v Jie Cui | 6-4,7-6 |
| Challenger Launceston Qual | 2018/02/04 02:00 | Benjamin Mitchell v Jacob Grills | 7-5,6-3 |
| Challenger Launceston Qual | 2018/02/03 02:20 | Benjamin Cawston v Jacob Grills | 0-6,1-6 |
| Challenger Burnie Qual | 2018/01/27 06:30 | Gerard Granollers-Pujol v Jacob Grills | 7-5,6-7,6-1 |
| Challenger Burnie Qual | 2018/01/27 02:10 | Jacob Grills v Peter Kobelt | 6-3,6-3 |