Ruben Alvarenga defeated Alejandro Aramburu 6-2 6-2 in the Uruguay Paraguay Masters 1 round of 16 on clay. The upset overturned the form book — Alejandro Aramburu came in leading the head-to-head 1–0. Ruben Alvarenga claimed a first win over Alejandro Aramburu in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 1993-11-06 | Uruguay Paraguay Masters 2 | R32 | clay | Alejandro Aramburu | 6-4 6-3 |