Yuichi Ito defeated Shuichi Sekiguchi 6-1 6-3 in the Japan F1 semi-final on hard. The upset overturned the form book — Shuichi Sekiguchi came in leading the head-to-head 6–0. Yuichi Ito claimed a first win over Shuichi Sekiguchi in seven meetings, narrowing the head-to-head to 6–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2016-05-30 | Japan F6 | QF | clay | Shuichi Sekiguchi | 6-1 6-2 |
| 2014-04-14 | China F5 | R32 | hard | Shuichi Sekiguchi | 6-3 6-4 |
| 2013-06-10 | Japan F5 | QF | clay | Shuichi Sekiguchi | 6-2 7-6(7) |
| 2011-06-20 | Japan F7 | QF | grass | Shuichi Sekiguchi | 7-6(4) 2-6 7-5 |
| 2011-06-13 | Japan F6 | R32 | hard | Shuichi Sekiguchi | 6-1 6-1 |
| 2010-04-05 | Japan F4 | SF | hard | Shuichi Sekiguchi | 6-2 2-1 |
Averages over each player's completed matches in the selected window (23 vs 182). 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