David Caballero advanced when Oscar Martinez Dieguez retired 7-6 3-2 in the Spain 2 Masters 4 round of 32. David Caballero claimed a first win over Oscar Martinez Dieguez in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 1993-05-14 | Spain 4 Masters 2 | R32 | clay | Oscar Martinez Dieguez | 6-0 |