Oscar Martinez Dieguez defeated David Salvador Estepa 6-3 4-6 6-1 in the Spain 1 Masters 4 round of 32 on hard. The upset overturned the form book — David Salvador Estepa came in leading the head-to-head 3–1. Oscar Martinez Dieguez narrowed the head-to-head to 3–2.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 1998-02-27 | Spain 3 Masters 3 | R16 | clay | David Salvador Estepa | 6-4 4-6 6-2 |
| 1997-10-17 | Spain 9 Masters 3 | R16 | clay | David Salvador Estepa | 6-7 6-1 6-4 |
| 1993-08-13 | Spain 6 Masters 2 | SF | clay | David Salvador Estepa | 6-2 6-0 |
| 1993-08-13 | Spain 6 Masters 4 | QF | clay | Oscar Martinez Dieguez | 6-4 6-2 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.