Mario Carnevale advanced when Gonzalo Lopez Fabero retired 6-4 2-0 in the Spain 5 Masters 3 round of 16. Mario Carnevale claimed a first win over Gonzalo Lopez Fabero in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 1991-05-20 | Spain 5 Masters 1 | QF | clay | Gonzalo Lopez Fabero | 6-4 7-6 |