Jae Sung An defeated Weerapat Doakmaiklee 6-3 6-2 in the Thailand F2 round of 32 on hard. The result followed the form book — Jae Sung An came in leading the head-to-head 3–0. Jae Sung An extended the head-to-head to 4–0.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2009-08-24 | Thailand F2 | QF | hard | Jae Sung An | 7-5 1-0 |
| 2008-02-25 | Thailand F3 | R32 | hard | Jae Sung An | 6-1 6-2 |
| 2006-08-07 | Thailand F4 | R32 | hard | Jae Sung An | 6-1 6-2 |