Woong Sun Jun defeated Young Jun Kim 5-7 6-4 6-3 in the Korea Rep F1 round of 16 on hard. Woong Sun Jun extended the head-to-head to 2–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2012-05-21 | Korea F2 | R16 | hard | Woong Sun Jun | 7-6(7) 1-6 7-6(3) |
| 2003-05-05 | Korea Rep F2 | R32 | clay | Young Jun Kim | 6-3 6-3 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.