Hiroyasu Sato defeated Arata Onozawa 6-4 7-6 in the Japan F7 round of 32 on clay. The upset overturned the form book — Arata Onozawa came in leading the head-to-head 1–0. Hiroyasu Sato claimed a first win over Arata Onozawa in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2007-06-11 | Japan F6 | R16 | carpet | Arata Onozawa | 4-6 7-6(4) 6-2 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.