Masaki Sasai defeated Arata Onozawa 3-6 6-2 6-3 in the Japan F7 round of 32 on hard. Masaki Sasai extended the head-to-head to 2–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2015-03-16 | Japan F2 | R32 | hard | Masaki Sasai | 6-4 6-4 |
| 2012-06-11 | Japan F5 | R32 | clay | Arata Onozawa | 6-4 6-2 |
Averages over each player's completed matches in the selected window (1 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. Small sample — read as indicative. About