Stadium: Central Court Round: 25 Ground: Clay
| Challenger Nanchang Qual | 2018/04/15 03:00 | Sekiguchi, Shuichi v Li, Yuanfeng | 6-3,6-1 |
| Challenger - Taipei | 2018/04/11 06:35 | Sekiguchi, Shuichi v Sela, Dudi | 4-6,2-6 |
| Challenger Taipei Qual | 2018/04/08 07:25 | Toshihide Matsui v Sekiguchi, Shuichi | 5-7,6-7 |
| Challenger Taipei Qual | 2018/04/07 08:20 | Vishnu Vardhan v Sekiguchi, Shuichi | 4-6,5-7 |
| ITF Japan F4 | 2018/03/27 01:00 | Grills, Jacob v Sekiguchi, Shuichi | 7-6,4-6,6-3 |
| ITF Japan F3 | 2018/03/22 04:05 | Sekiguchi, Shuichi v Katayama, Sho | 5-7,6-4,2-6 |
| ITF Japan F3 | 2018/03/19 01:00 | Sekiguchi, Shuichi v Jumpei Yamasaki | 6-7,7-6,6-2 |
| ITF Japan F2 | 2018/03/12 02:30 | Hong, Seong Chan v Sekiguchi, Shuichi | 6-4,1-6,7-6 |
| Coupe Davis | 2018/04/06 04:00 | Zhang, Ze v Sumit Nagal | 6-4,6-1 |
| Challenger Qujing | 2018/03/22 04:45 | Zhang, Ze v Ilya Ivashka | 3-6,6-3,3-6 |
| Challenger Qujing | 2018/03/20 06:50 | Zhang, Ze v Luke Saville | 7-5,7-6 |
| Challenger - Shenzhen | 2018/03/18 05:45 | Zhang, Ze v Ilya Ivashka | 4-6,2-6 |
| Challenger - Shenzhen | 2018/03/17 04:35 | Hubert Hurkacz v Zhang, Ze | 6-7,6-2,2-6 |
| Challenger - Shenzhen | 2018/03/16 07:20 | Galovic, Viktor v Zhang, Ze | 4-6,7-6,3-6 |
| Challenger - Shenzhen | 2018/03/15 08:30 | Zhang, Ze v Oscar Otte | 6-1,7-5 |
| Challenger - Shenzhen | 2018/03/13 05:05 | Jaume Munar v Zhang, Ze | 6-3,4-6,2-6 |