Jae Sung An defeated Arata Onozawa 6-3 6-2 in the Thailand F3 round of 16 on hard. Jae Sung An extended the head-to-head to 2–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2011-04-04 | Thailand F2 | R32 | hard | Arata Onozawa | 6-3 6-2 |
| 2009-07-13 | Korean Rep F5 | R32 | hard | Jae Sung An | 7-5 6-4 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.