Petra Plackova defeated Libuse Prusova 6-4 6-2 in the Valasske Mezirici 10K qualifying round on clay. The upset overturned the form book — Libuse Prusova came in leading the head-to-head 1–0. Petra Plackova claimed a first win over Libuse Prusova in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 1997-06-11 | Kedzieizyn-Kosle 10K | R16 | clay | Libuse Prusova | 6-4 6-0 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.