Jae Sung An defeated Seong Yoon Chung 7-5 3-6 6-4 in the Korean Rep F1 round of 32 on hard. Jae Sung An extended the head-to-head to 2–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2005-06-27 | Japan F8 | R16 | hard | Seong Yoon Chung | 6-2 6-2 |
| 2005-06-20 | Japan F7 | SF | clay | Jae Sung An | 6-4 7-5 |