Jae Sung An defeated Chul Hee Lee 6-4 6-3 in the Japan F7 round of 16 on carpet. The result followed the form book — Jae Sung An came in leading the head-to-head 2–1. Jae Sung An extended the head-to-head to 3–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2009-04-06 | Korean Rep F1 | R16 | hard | Chul Hee Lee | 7-5 6-3 |
| 2007-06-11 | Thailand F2 | QF | hard | Jae Sung An | 6-2 6-2 |
| 2007-05-07 | Korea Rep F3 | R32 | hard | Jae Sung An | 6-2 6-2 |