Isabella Shinikova defeated Natalija Kostic 6-4 6-4 in the Dobrich 25K round of 32 on clay. Isabella Shinikova extended the head-to-head to 2–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2011-07-04 | Prokuplje 10K | R32 | clay | Isabella Shinikova | 6-2 6-1 |
| 2009-06-29 | Prokuplje 10K | R32 | clay | Natalija Kostic | 6-0 4-6 6-4 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.