Nastja Kolar defeated Lenka Wienerova 6-1 6-1 in the Biella 100K qualifying round on clay. The upset overturned the form book — Lenka Wienerova came in leading the head-to-head 1–0. Nastja Kolar claimed a first win over Lenka Wienerova in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2012-07-16 | Darmstadt 25K | R32 | clay | Lenka Wienerova | 5-7 6-0 6-1 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.