Juan Carlos Ferrero defeated Oscar Martinez Dieguez 6-1 6-2 in the Spain F3 qualifying round on clay. Juan Carlos Ferrero extended the head-to-head to 2–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 1998-01-30 | Spain 2 Masters 3 | R32 | clay | Juan Carlos Ferrero | 6-4 6-1 |
| 1997-05-09 | Spain 4 Masters 2 | R32 | clay | Oscar Martinez Dieguez | 7-6 7-6 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.