Ji Sung Nam defeated Hyun Woo Nam 7-5 7-6 in the Korea F4 qualifying round on hard. Ji Sung Nam extended the head-to-head to 3–2.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2016-08-22 | Korea F6 | R32 | clay | Ji Sung Nam | 1-6 7-6(4) 3-0 |
| 2015-09-07 | Korea F7 | R32 | clay | Hyun Woo Nam | 1-2 |
| 2014-04-21 | Korea F1 | R32 | hard | Ji Sung Nam | 6-4 1-0 |
| 2012-09-24 | Vietnam F6 | R32 | hard | Hyun Woo Nam | 6-4 6-3 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.