Catalina Castano defeated Melisa Arevalo 6-3 6-4 in the San Luis Potosi 25K qualifying round on clay. The upset overturned the form book — Melisa Arevalo came in leading the head-to-head 1–0, but Catalina Castano had been the form player, winning 3 of their last 6 on clay. Catalina Castano claimed a first win over Melisa Arevalo in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 1998-08-18 | Ibarra 10K | SF | clay | Melisa Arevalo | 6-3 7-6 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.