Hector Ruiz Cadenas defeated Jacobo Diaz 2-6 6-4 6-4 in the Spain F3 round of 32 on clay. The upset overturned the form book — Jacobo Diaz came in leading the head-to-head 1–0. Hector Ruiz Cadenas claimed a first win over Jacobo Diaz in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2004-07-19 | Spain F15 | F | clay | Jacobo Diaz | 6-4 7-5 |