Sandra Zaniewska defeated Lenka Wienerova 3-6 7-5 7-5 in the Tunis 25K round of 32 on clay. The upset overturned the form book — Lenka Wienerova came in leading the head-to-head 2–0. Sandra Zaniewska claimed a first win over Lenka Wienerova in three meetings, narrowing the head-to-head to 2–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2010-03-22 | Namangan 25K | R32 | hard | Lenka Wienerova | 6-4 6-3 |
| 2009-03-16 | Cairo 25K | R32 | clay | Lenka Wienerova | 6-3 6-3 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.