Masato Hatanaka defeated Tetsuya Chaen 6-1 6-3 in the Japan F6 round of 16 on carpet. The result followed the form book — Masato Hatanaka came in leading the head-to-head 3–0. Masato Hatanaka extended the head-to-head to 4–0.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2008-03-24 | Japan F2 | R32 | hard | Masato Hatanaka | 6-1 1-6 6-3 |
| 2007-09-17 | Japan F9 | QF | carpet | Masato Hatanaka | 6-0 5-7 6-2 |
| 2006-06-19 | Japan F7 | R32 | carpet | Masato Hatanaka | 6-2 6-3 |