Tetsuya Chaen defeated Atsuo Ogawa 6-2 6-2 in the Japan F7 round of 32 on hard. The result followed the form book — Tetsuya Chaen came in leading the head-to-head 4–1. Tetsuya Chaen extended the head-to-head to 5–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2006-04-17 | Japan F2 | R16 | carpet | Tetsuya Chaen | 6-4 6-0 |
| 2005-09-05 | Japan F10 | R32 | hard | Tetsuya Chaen | 6-0 6-1 |
| 2005-08-15 | Indonesia F3 | R16 | hard | Tetsuya Chaen | 6-1 6-2 |
| 2005-08-08 | Indonesia F2 | QF | hard | Atsuo Ogawa | 7-5 7-6(1) |
| 2002-04-08 | Japan F1 | R32 | clay | Tetsuya Chaen | 6-2 6-2 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.