Jae Sung An defeated Satoshi Iwabuchi 6-4 6-1 in the Thailand F2 round of 32 on hard. The upset overturned the form book — Satoshi Iwabuchi came in leading the head-to-head 2–0. Jae Sung An claimed a first win over Satoshi Iwabuchi in three meetings, narrowing the head-to-head to 2–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2009-03-23 | Japan F2 | R32 | hard | Satoshi Iwabuchi | 7-6(6) 6-3 |
| 2006-06-12 | Japan F6 | QF | clay | Satoshi Iwabuchi | 6-2 6-1 |