Zuzana Ondraskova defeated Zuzana Hejdova 6-4 6-1 in the Prostejov 25K round of 32 on clay. The upset overturned the form book — Zuzana Hejdova came in leading the head-to-head 1–0. Zuzana Ondraskova claimed a first win over Zuzana Hejdova in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 1997-06-11 | Kedzieizyn-Kosle 10K | QF | clay | Zuzana Hejdova | 7-6 7-5 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.