Alex Calatrava defeated Oscar Martinez Dieguez 6-3 6-2 in the Spain 4 Masters 2 qualifying round on clay. The result followed the form book — Alex Calatrava came in leading the head-to-head 2–0. Alex Calatrava extended the head-to-head to 3–0.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 1997-01-31 | Spain 2 Masters 3 | R32 | clay | Alex Calatrava | 7-6 6-2 |
| 1993-08-13 | Spain 6 Masters 3 | QF | clay | Alex Calatrava | 6-0 5-7 6-4 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.