Hiromasa Oku defeated Yutaro Matsuzaki 6-4 5-7 6-3 in the Japan F2 q32 on hard. The upset overturned the form book — Yutaro Matsuzaki came in leading the head-to-head 2–0. Hiromasa Oku claimed a first win over Yutaro Matsuzaki in three meetings, narrowing the head-to-head to 2–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2015-03-16 | Japan F2 | R32 | hard | Yutaro Matsuzaki | 6-2 3-6 7-6(2) |
| 2014-03-24 | Japan F3 | Q16 | hard | Yutaro Matsuzaki | 6-2 6-4 |
Averages over each player's completed matches in the selected window (19 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