Woong Sun Jun defeated Arata Onozawa 6-4 4-6 6-2 in the Korea F7 qualifying round on clay. Woong Sun Jun extended the head-to-head to 2–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2012-06-11 | Japan F5 | QF | clay | Arata Onozawa | 5-7 7-6(4) 7-5 |
| 2011-10-24 | Laos F1 | QF | hard | Woong Sun Jun | 7-5 6-2 |
Averages over each player's completed matches in the selected window (6 vs 41). 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