Antoaneta Pandjerova defeated Zuzana Valekova 6-4 7-5 in the Sofia 25K qualifying round on clay. The upset overturned the form book — Zuzana Valekova came in leading the head-to-head 1–0, but Antoaneta Pandjerova had been the form player, winning 4 of their last 6 on clay. Antoaneta Pandjerova claimed a first win over Zuzana Valekova in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 1998-03-25 | Makarska Satellite 10K | R16 | clay | Zuzana Valekova | 6-4 3-6 6-3 |