Katarina Studenikova defeated Magdalena Grzybowska 6-3 6-2 in the Warsaw round of 32 on clay. The upset overturned the form book — Magdalena Grzybowska came in leading the head-to-head 1–0, but Katarina Studenikova had been the form player, winning 3 of their last 7 on clay. Katarina Studenikova claimed a first win over Magdalena Grzybowska in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 1998-08-31 | US Open | R128 | hard | Magdalena Grzybowska | 6-0 6-1 |