Nikola Cacic defeated Vladimir Obradovic 3-6 6-3 6-2 in the Serbia F8 qualifying round on clay. The upset overturned the form book — Vladimir Obradovic came in leading the head-to-head 1–0. Nikola Cacic claimed a first win over Vladimir Obradovic in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2011-08-01 | Serbia F5 | QF | clay | Vladimir Obradovic | 1-6 6-4 7-5 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.