Nathalie Vierin defeated Gabriela Volekova 4-6 6-2 6-3 in the San Luis Potosi 25K round of 16 on clay. The upset overturned the form book — Gabriela Volekova came in leading the head-to-head 1–0. Nathalie Vierin claimed a first win over Gabriela Volekova in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 1998-12-07 | Ismailia 10K | QF | clay | Gabriela Volekova | 6-0 6-1 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.