Robert Belak advanced when Nikola Ciric retired 6-3 3-3 in the Croatia F4 round of 32. Robert Belak claimed a first win over Nikola Ciric in four meetings, narrowing the head-to-head to 3–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2008-08-11 | Serbia F4 | R32 | clay | Nikola Ciric | 6-3 6-4 |
| 2008-08-04 | Serbia F3 | QF | clay | Nikola Ciric | 6-2 6-1 |
| 2006-07-31 | Serbia & Montenegro F3 | R32 | clay | Nikola Ciric | 6-4 6-4 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.