Klara Koukalova defeated Virag Csurgo 6-3 6-2 in the Pec 10K qualifying round on clay. The upset overturned the form book — Virag Csurgo came in leading the head-to-head 1–0. Klara Koukalova claimed a first win over Virag Csurgo in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 1999-09-13 | Otocec 25K | R32 | clay | Virag Csurgo | 5-7 6-4 7-5 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.