Marcelo Rebelo defeated Ruben Alvarenga 6-4 7-5 in the Argentina 1 Masters 4 round of 32 on clay. The upset overturned the form book — Ruben Alvarenga came in leading the head-to-head 1–0. Marcelo Rebelo claimed a first win over Ruben Alvarenga in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 1992-05-11 | Brazil 3 Masters 2 | R16 | clay | Ruben Alvarenga | 7-5 6-7 6-2 |