Karolina Sprem defeated Jelena Kostanic Tosic 6-2 7-6 in the Istanbul round of 32 on clay. The upset overturned the form book — Jelena Kostanic Tosic came in leading the head-to-head 2–0. Karolina Sprem claimed a first win over Jelena Kostanic Tosic in three meetings, narrowing the head-to-head to 2–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2007-04-08 | Charleston | Q16 | clay | Jelena Kostanic Tosic | 6-4 6-2 |
| 2004-08-30 | US Open | R128 | hard | Jelena Kostanic Tosic | 6-3 2-6 6-4 |
Averages over each player's completed matches in the selected window (66 vs 32). ATP, WTA & Challenger.
Performance in the biggest moments — break points, deciding sets and tiebreaks (0–100, higher is better). About
Each player's serve crossed against the other's return, converted to expected hold of serve. Recent completed matches, ATP, WTA & Challenger. About