Woong Sun Jun defeated Sang Oh Oh 6-0 6-4 in the Korea F4 q16 on hard. Woong Sun Jun extended the head-to-head to 2–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2015-05-18 | Korea F1 | Q16 | hard | Sang Oh Oh | 2-6 7-5 6-3 |
| 2014-06-16 | Korea F6 | R16 | hard | Woong Sun Jun | 6-3 6-4 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.