Tetsuya Chaen defeated Hiroyasu Sato 6-2 6-4 in the Japan F1 round of 16 on hard. The result followed the form book — Tetsuya Chaen came in leading the head-to-head 1–0. Tetsuya Chaen extended the head-to-head to 2–0.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2007-09-10 | Japan F8 | R32 | hard | Tetsuya Chaen | 6-7(5) 6-2 7-5 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.