Desislava Topalova defeated Mareze Joubert 6-1 6-1 in the Mount Gambier Challenger round of 32 on hard. The upset overturned the form book — Mareze Joubert came in leading the head-to-head 1–0, but Desislava Topalova had been the form player, winning 2 of their last 6 on hard. Desislava Topalova claimed a first win over Mareze Joubert in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 1998-11-16 | Port Pirie 25K | R32 | hard | Mareze Joubert | 7-5 7-6 |