Issei Okamura defeated Yuichi Ito 6-4 6-7 6-3 in the Kobe CH qualifying round 1 on hard. The upset overturned the form book — Yuichi Ito came in leading the head-to-head 2–1. Issei Okamura narrowed the head-to-head to 2–2.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2016-09-12 | Vietnam F4 | QF | hard | Yuichi Ito | 6-2 4-6 6-4 |
| 2014-03-31 | Japan F4 | R32 | hard | Issei Okamura | 6-7(4) 6-2 7-6(4) |
| 2013-04-01 | Japan F4 | F | hard | Yuichi Ito | 6-3 3-6 6-2 |
Averages over each player's completed matches in the selected window (169 vs 3). 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