Stadium: Court 1 Round: 45
| Challenger Seoul Qual | 2018/04/29 02:00 | Ji Hoon Son v Shuichi Sekiguchi | 6-2,7-6 |
| Challenger Nanchang Qual | 2018/04/15 03:00 | Shuichi Sekiguchi v Yuanfeng Li | 6-3,6-1 |
| Challenger Taipei | 2018/04/11 06:35 | Shuichi Sekiguchi v Dudi Sela | 4-6,2-6 |
| Challenger Taipei Qual | 2018/04/08 07:25 | Toshihide Matsui v Shuichi Sekiguchi | 5-7,6-7 |
| Challenger Taipei Qual | 2018/04/07 08:20 | Vishnu Vardhan v Shuichi Sekiguchi | 4-6,5-7 |
| ITF Japan F4 | 2018/03/27 01:00 | Jacob Grills v Shuichi Sekiguchi | 7-6,4-6,6-3 |
| ITF Japan F3 | 2018/03/22 04:05 | Shuichi Sekiguchi v Sho Katayama | 5-7,6-4,2-6 |
| ITF Japan F3 | 2018/03/19 01:00 | Shuichi Sekiguchi v Jumpei Yamasaki | 6-7,7-6,6-2 |
| ITF Uzbekistan F2 | 2018/04/25 08:40 | Hiroki Moriya v Mikhail Fufygin | 6-0,6-7,6-1 |
| ITF Uzbekistan F2 | 2018/04/24 12:30 | Shahbaaz Khan v Mikhail Fufygin | 4-6,4-6 |
| ITF Uzbekistan F1 | 2018/04/17 11:45 | Hiroki Moriya v Mikhail Fufygin | 6-2,7-6 |
| ITF Russia F3 | 2018/03/14 11:30 | Mikhail Fufygin v Sergey Betov | 6-1,5-7,1-6 |
| ITF Russia F3 | 2018/03/13 12:05 | Mikhail Fufygin v Artur Shakhnubaryan | 6-1,1-6,7-5 |
| ITF Russia F2 | 2018/03/07 07:00 | Alexander Igoshin v Mikhail Fufygin | 4-6,2-6 |
| ITF Russia F2 | 2018/03/06 11:15 | Grigoriy Lomakin v Mikhail Fufygin | 1-6,6-7 |
| ITF Kazakhstan F2 | 2018/02/20 09:35 | Sanjar Fayziev v Mikhail Fufygin | 6-7,7-6,6-3 |