Nicolas Meister defeated Ji Sung Nam 1-6 6-2 6-3 in the Vietnam F3 qualifying round on hard. The upset overturned the form book — Ji Sung Nam came in leading the head-to-head 3–0. Nicolas Meister claimed a first win over Ji Sung Nam in four meetings, narrowing the head-to-head to 3–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2013-06-17 | Korea F7 | QF | hard | Ji Sung Nam | 6-7(5) 6-1 6-3 |
| 2013-03-18 | USA F8 | QF | hard | Ji Sung Nam | 3-6 6-2 7-6(5) |
| 2013-02-25 | USA F6 | R16 | hard | Ji Sung Nam | 5-7 6-2 6-3 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.