Oscar Martinez Dieguez defeated Victor Sendin 4-6 6-4 7-6 in the Spain 3 Masters 4 round of 32 on clay. The upset overturned the form book — Victor Sendin came in leading the head-to-head 2–0. Oscar Martinez Dieguez claimed a first win over Victor Sendin in three meetings, narrowing the head-to-head to 2–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 1999-04-09 | Spain 4 Masters 4 | R16 | clay | Victor Sendin | 6-1 6-2 |
| 1997-05-09 | Spain 4 Masters 1 | R16 | clay | Victor Sendin | 6-2 7-6 |