Oh Hee Kwon defeated Woong Sun Jun 6-4 6-2 in the Korea Rep F1 semi-final on hard. The upset overturned the form book — Woong Sun Jun came in leading the head-to-head 2–1, but Oh Hee Kwon had been the form player, winning 4 of their last 6 on hard. Oh Hee Kwon narrowed the head-to-head to 2–2.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2010-04-12 | Korea F2 | R16 | hard | Woong Sun Jun | 3-6 6-4 6-1 |
| 2005-05-02 | Korea Rep F1 | QF | hard | Woong Sun Jun | 7-6(5) 6-3 |
| 2003-04-28 | Korea Rep F1 | QF | clay | Oh Hee Kwon | 6-3 6-2 |
Averages over each player's completed matches in the selected window (17 vs 14). ATP, WTA & Challenger.
Each player's serve crossed against the other's return, converted to expected hold of serve. Recent completed matches, ATP, WTA & Challenger. About