Shuichi Sekiguchi defeated Kento Takeuchi 6-2 6-4 in the M25 Sapporo 1 round of 16 on hard. The result followed the form book — Shuichi Sekiguchi came in leading the head-to-head 4–2. Shuichi Sekiguchi extended the head-to-head to 5–2.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2019-10-10 | M25 Tay Ninh 2 | R16 | hard | Shuichi Sekiguchi | 5-5 |
| 2015-06-15 | Thailand F4 | F | hard | Shuichi Sekiguchi | 6-1 6-2 |
| 2014-03-17 | Japan F2 | QF | hard | Shuichi Sekiguchi | 6-1 6-3 |
| 2014-03-10 | Japan F1 | R32 | hard | Kento Takeuchi | 6-3 2-1 |
| 2010-10-11 | Japan F9 | R32 | hard | Shuichi Sekiguchi | 6-0 2-6 6-4 |
| 2010-03-22 | Japan F2 | R32 | hard | Kento Takeuchi | 6-7(1) 7-5 6-3 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.