Hiroyasu Ehara defeated Yusuke Watanuki 6-3 2-6 6-2 in the Japan F4 qualifying round on hard. The upset overturned the form book — Yusuke Watanuki came in leading the head-to-head 2–0. Hiroyasu Ehara claimed a first win over Yusuke Watanuki in three meetings, narrowing the head-to-head to 2–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2015-06-15 | Japan F7 | F | carpet | Yusuke Watanuki | 5-7 6-4 6-2 |
| 2014-03-24 | Japan F3 | SF | hard | Yusuke Watanuki | 6-1 6-3 |
Averages over each player's completed matches in the selected window (38 vs 20). 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