Jung Woong Na defeated Hiromasa Oku 4-6 6-1 6-0 in the Korea F6 round of 32 on clay. The result followed the form book — Jung Woong Na came in leading the head-to-head 2–0. Jung Woong Na extended the head-to-head to 3–0.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2015-08-17 | Korea F4 | R16 | hard | Jung Woong Na | 6-3 6-4 |
| 2014-04-28 | Korea F2 | Q16 | hard | Jung Woong Na | 6-3 6-4 |
Averages over each player's completed matches in the selected window (60 vs 18). 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