Gonzalo Lopez Fabero defeated Mario Carnevale 6-4 7-6 in the Spain 5 Masters 1 qualifying round on clay. The upset overturned the form book — Mario Carnevale came in leading the head-to-head 1–0. Gonzalo Lopez Fabero claimed a first win over Mario Carnevale in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 1991-05-20 | Spain 5 Masters 3 | R16 | clay | Mario Carnevale | 6-4 2-0 |