Egberto Caldas defeated Ruben Alvarenga 6-1 6-3 in the Brazil 5 Masters 3 round of 32 on clay. The upset overturned the form book — Ruben Alvarenga came in leading the head-to-head 1–0, but Egberto Caldas had been the form player, winning 6 of their last 10 on clay. Egberto Caldas claimed a first win over Ruben Alvarenga in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 1991-07-15 | Brazil 5 Masters 4 | R16 | clay | Ruben Alvarenga | 7-6 6-4 |