Helena Vildova defeated Jelena Kostanic Tosic 6-4 6-4 in the Hvar 10K round of 16 on clay. The upset overturned the form book — Jelena Kostanic Tosic came in leading the head-to-head 1–0. Helena Vildova claimed a first win over Jelena Kostanic Tosic in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 1998-04-01 | Hvar 10K | R32 | clay | Jelena Kostanic Tosic | 6-1 6-2 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.