Jae Sung An defeated Seong Yoon Chung 6-4 7-5 in the Japan F7 semi-final on clay. Jae Sung An extended the head-to-head to 2–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2009-04-06 | Korean Rep F1 | R32 | hard | Jae Sung An | 7-5 3-6 6-4 |
| 2005-06-27 | Japan F8 | R16 | hard | Seong Yoon Chung | 6-2 6-2 |