Stadium: Court 4 Round: 25 Ground: Hardcourt outdoor
| ITF Vietnam F4 | 2018/10/25 03:00 | Shuichi Sekiguchi v Filip Bergevi | 3-6,4-6 |
| ITF Vietnam F4 | 2018/10/23 05:20 | Shuichi Sekiguchi v Billy Harris | 7-6,4-6,7-6 |
| ITF Slovakia F3 | 2018/08/07 11:25 | Samm Butler v Shuichi Sekiguchi | 6-1,7-6 |
| ITF Austria F3 | 2018/07/16 08:00 | Jorge Panta v Shuichi Sekiguchi | 1-6,7-6,7-5 |
| ITF Czech Republic F6 | 2018/07/10 08:00 | Martin Bugaj v Shuichi Sekiguchi | 6-1,6-2 |
| ITF China F9 | 2018/07/06 03:00 | Min-Kyu Song v Shuichi Sekiguchi | 6-2,6-1 |
| ITF China F9 | 2018/07/05 04:35 | Chenhe Li v Shuichi Sekiguchi | 2-6,5-7 |
| ITF China F9 | 2018/07/03 07:00 | Lingxi Zhao v Shuichi Sekiguchi | 2-6,0-6 |