Mathilde Johansson defeated Vilmarie Castellvi 7-5 6-1 in the Coatzacoalcos 25K round of 32 on hard. The upset overturned the form book — Vilmarie Castellvi came in leading the head-to-head 1–0. Mathilde Johansson claimed a first win over Vilmarie Castellvi in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2005-03-28 | Poza Rica 25K | R32 | hard | Vilmarie Castellvi | 6-0 6-2 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.