Hyun Woo Nam defeated Woong Sun Jun 7-5 6-3 in the Korea F6 round of 16 on hard. The upset overturned the form book — Woong Sun Jun came in leading the head-to-head 3–1. Hyun Woo Nam narrowed the head-to-head to 3–2.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2013-06-24 | Korea F8 | R32 | hard | Woong Sun Jun | 6-3 6-4 |
| 2013-05-20 | Korea F3 | R32 | hard | Hyun Woo Nam | 6-1 7-5 |
| 2012-06-11 | Japan F5 | R32 | clay | Woong Sun Jun | 6-3 6-3 |
| 2006-04-17 | Japan F2 | R16 | carpet | Woong Sun Jun | 6-3 6-1 |
Averages over each player's completed matches in the selected window (13 vs 6). 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