Jun Chao Xu defeated Arata Onozawa 6-1 6-2 in the Japan F4 round of 32 on clay. The upset overturned the form book — Arata Onozawa came in leading the head-to-head 1–0. Jun Chao Xu claimed a first win over Arata Onozawa in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2012-05-14 | China F7 | R32 | hard | Arata Onozawa | 6-2 6-2 |
Averages over each player's completed matches in the selected window (1 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. Small sample — read as indicative. About