Israel Vior Diaz defeated Carlos Castellanos 6-3 7-6 in the Spain 3 Masters 1 round of 32 on clay. The upset overturned the form book — Carlos Castellanos came in leading the head-to-head 1–0. Israel Vior Diaz claimed a first win over Carlos Castellanos in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 1998-05-08 | Spain 5 Masters 3 | R32 | clay | Carlos Castellanos | 7-6 6-2 |