Michelle Gerards defeated Nathalie Vierin 6-4 1-6 6-3 in the San Luis Potosi 1 25K round of 32 on clay. The upset overturned the form book — Nathalie Vierin came in leading the head-to-head 2–1, but Michelle Gerards had been the form player, winning 6 of their last 9 on clay. Michelle Gerards narrowed the head-to-head to 2–2.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2004-09-27 | Oporto 25K | F | clay | Nathalie Vierin | 3-6 7-5 6-3 |
| 2004-08-30 | Mestre 25K | R32 | clay | Michelle Gerards | 6-2 6-1 |
| 2004-04-19 | Bari 25K | R32 | clay | Nathalie Vierin | 6-3 6-3 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.