Maria Florencia Cianfagna defeated Mariana Lopez Palacios 3-6 7-5 6-3 in the Sao Paulo 25K round of 32 on clay. The upset overturned the form book — Mariana Lopez Palacios came in leading the head-to-head 1–0. Maria Florencia Cianfagna claimed a first win over Mariana Lopez Palacios in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 1996-05-20 | Buenos Aires 10K | F | clay | Mariana Lopez Palacios | 6-1 1-6 7-6 |