Stadium: Court 1 Round: 54
| Jinan, China | 2017/08/07 03:40 | Prashanth, N. Vijay Sundar v Sekiguchi, Shuichi | 4-6,4-6 |
| Challenger Karshi Qual | 2018/05/06 06:00 | Shyla, Yaraslau v Sekiguchi, Shuichi | 6-3,1-6,2-6 |
| Challenger Karshi Qual | 2018/05/05 06:35 | Sekiguchi, Shuichi v Fufygin, Mikhail | 4-6,6-4,6-1 |
| Challenger Seoul Qual | 2018/04/29 02:00 | Son, Ji Hoon v Sekiguchi, Shuichi | 6-2,7-6 |
| 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 |
| Challenger Karshi Qual | 2018/05/06 06:00 | Bielinskyi, Oleksandr v Prashanth, N. Vijay Sundar | 2-6,2-6 |
| Challenger Karshi Qual | 2018/05/05 07:55 | Khabibulin, Timur v Prashanth, N. Vijay Sundar | 7-5,3-6,0-6 |
| ITF Uzbekistan F2 | 2018/04/24 11:45 | Cacic, Nikola v Prashanth, N. Vijay Sundar | 7-6,2-6,6-4 |
| ITF India F4 | 2018/03/24 04:30 | Arjun Kadhe v Prashanth, N. Vijay Sundar | 3-6,3-6 |
| ITF India F4 | 2018/03/23 04:30 | Prashanth, N. Vijay Sundar v Turini, Thales | 7-5,6-1 |
| ITF India F4 | 2018/03/22 05:30 | Manish Sureshkumar v Prashanth, N. Vijay Sundar | 0-6,4-6 |
| ITF India F4 | 2018/03/21 06:55 | Sadler, Olly v Prashanth, N. Vijay Sundar | 1-6,3-6 |
| ITF India F4 | 2018/03/19 03:30 | Nenwani, Anurag v Prashanth, N. Vijay Sundar | 3-6,4-6 |