Edvaldo Oliveira defeated Enrique Perez Cassarino 7-6 6-4 in the Brazil 1 Masters 3 round of 32 on clay. The upset overturned the form book — Enrique Perez Cassarino came in leading the head-to-head 1–0. Edvaldo Oliveira claimed a first win over Enrique Perez Cassarino in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 1991-03-18 | Brazil 1 Masters 1 | R16 | clay | Enrique Perez Cassarino | 6-0 7-6 |