Nikola Ciric defeated Jan Masik 6-4 6-4 in the Serbia & Montenegro 1 4 qualifying round on clay. The upset overturned the form book — Jan Masik came in leading the head-to-head 2–0. Nikola Ciric claimed a first win over Jan Masik in three meetings, narrowing the head-to-head to 2–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2003-08-11 | Serbia & Montenegro 1 2 | SF | clay | Jan Masik | 6-3 6-4 |
| 2002-08-05 | Egypt F3 | QF | clay | Jan Masik | 7-6(4) 6-4 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.