Masato Shiga defeated Arata Onozawa 7-6 3-6 6-4 in the Japan F4 round of 32 on hard. The upset overturned the form book — Arata Onozawa came in leading the head-to-head 1–0. Masato Shiga claimed a first win over Arata Onozawa in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2015-04-27 | Thailand F2 | R32 | hard | Arata Onozawa | 6-3 7-6(7) |
Averages over each player's completed matches in the selected window (59 vs 46). 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