Chul Hee Lee defeated Jae Sung An 7-5 6-3 in the Korean Rep F1 round of 16 on hard. The upset overturned the form book — Jae Sung An came in leading the head-to-head 3–0. Chul Hee Lee claimed a first win over Jae Sung An in four meetings, narrowing the head-to-head to 3–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 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 |
| 2006-06-19 | Japan F7 | R16 | carpet | Jae Sung An | 6-4 6-3 |