Shuichi Sekiguchi defeated Takuto Niki 6-4 6-4 in the M25 Matsuyama 1 final on hard. The upset overturned the form book — Takuto Niki came in leading the head-to-head 2–1, but Shuichi Sekiguchi had been the form player, winning 5 of their last 7 on hard. Shuichi Sekiguchi narrowed the head-to-head to 2–2.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2019-04-03 | M15 Kashiwa 1 | R32 | hard | Takuto Niki | 2-6 6-3 7-6(5) |
| 2019-03-16 | M15 Nishi-Tokyo 1 | SF | hard | Shuichi Sekiguchi | 6-4 6-7(6) 6-3 |
| 2011-06-20 | Japan F7 | SF | grass | Takuto Niki | 7-5 6-1 |
Averages over each player's completed matches in the selected window (50 vs 4). ATP, WTA & Challenger.
Each player's serve crossed against the other's return, converted to expected hold of serve. Recent completed matches, ATP, WTA & Challenger. About