Stadium: Court 1 Round: 54
| Challenger Jinan | 2017/08/07 03:40 | N. Vijay Sundar Prashanth v Shuichi Sekiguchi | 4-6,4-6 |
| Challenger Karshi Qual | 2018/05/06 06:00 | Yaraslav Shyla v Shuichi Sekiguchi | 6-3,1-6,2-6 |
| Challenger Karshi Qual | 2018/05/05 06:35 | Shuichi Sekiguchi v Mikhail Fufygin | 4-6,6-4,6-1 |
| 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 |
| Challenger Karshi Qual | 2018/05/06 06:00 | Oleksandr Bielinskyi v N. Vijay Sundar Prashanth | 2-6,2-6 |
| Challenger Karshi Qual | 2018/05/05 07:55 | Timur Khabibulin v N. Vijay Sundar Prashanth | 7-5,3-6,0-6 |
| ITF Uzbekistan F2 | 2018/04/24 11:45 | Nikola Cacic v N. Vijay Sundar Prashanth | 7-6,2-6,6-4 |
| ITF India F4 | 2018/03/24 04:30 | Arjun Kadhe v N. Vijay Sundar Prashanth | 3-6,3-6 |
| ITF India F4 | 2018/03/23 04:30 | N. Vijay Sundar Prashanth v Thales Turini | 7-5,6-1 |
| ITF India F4 | 2018/03/22 05:30 | Manish Sureshkumar v N. Vijay Sundar Prashanth | 0-6,4-6 |
| ITF India F4 | 2018/03/21 06:55 | Olly Sadler v N. Vijay Sundar Prashanth | 1-6,3-6 |
| ITF India F4 | 2018/03/19 03:30 | Anurag Nenwani v N. Vijay Sundar Prashanth | 3-6,4-6 |