Aleksandar Vlaski defeated Oh Hee Kwon 6-2 6-4 in the Korea Rep F2 qualifying round on hard. The upset overturned the form book — Oh Hee Kwon came in leading the head-to-head 2–1. Aleksandar Vlaski narrowed the head-to-head to 2–2.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2006-03-13 | Korea Rep F1 | QF | hard | Oh Hee Kwon | 6-3 7-6(0) |
| 2004-07-05 | China 1 Satellite 2 | QF | hard | Aleksandar Vlaski | 5-7 6-3 6-4 |
| 2004-07-05 | China 1 Satellite 3 | R16 | hard | Oh Hee Kwon | 4-6 7-6(2) 6-1 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.