Hiroyasu Ehara defeated Shuichi Sekiguchi 6-4 6-1 in the Gimcheon CH round of 16 on hard. The upset overturned the form book — Shuichi Sekiguchi came in leading the head-to-head 5–1. Hiroyasu Ehara narrowed the head-to-head to 5–2.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2017-06-05 | Japan F7 | R32 | hard | Shuichi Sekiguchi | 6-2 6-1 |
| 2013-06-24 | Japan F7 | QF | clay | Shuichi Sekiguchi | 6-1 2-1 |
| 2012-10-15 | Japan F9 | QF | hard | Shuichi Sekiguchi | 6-0 6-4 |
| 2012-03-26 | Japan F3 | R32 | hard | Shuichi Sekiguchi | 6-2 4-6 7-5 |
| 2010-06-28 | Japan F8 | R32 | clay | Hiroyasu Ehara | 6-2 6-2 |
| 2010-03-15 | Japan F1 | R16 | hard | Shuichi Sekiguchi | 7-5 6-2 |
Averages over each player's completed matches in the selected window (37 vs 200). 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