Kristina Steiert defeated Natasa Zoric 7-6 7-6 in the Biberach 25K round of 32 on hard. The upset overturned the form book — Natasa Zoric came in leading the head-to-head 1–0. Kristina Steiert claimed a first win over Natasa Zoric in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2009-10-12 | Dubrovnik 10K | R16 | clay | Natasa Zoric | 6-1 6-1 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.