Ruben Ramirez Hidalgo defeated Oscar Martinez Dieguez 7-5 6-4 in the Spain F3 qualifying round on clay. The upset overturned the form book — Oscar Martinez Dieguez came in leading the head-to-head 2–1. Ruben Ramirez Hidalgo narrowed the head-to-head to 2–2.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2000-03-06 | Spain 3 2 | R32 | clay | Ruben Ramirez Hidalgo | 6-3 6-0 |
| 1999-05-07 | Spain 5 Masters 2 | R16 | clay | Oscar Martinez Dieguez | 7-6 6-3 |
| 1998-07-20 | Spain F3 | R16 | clay | Oscar Martinez Dieguez | 6-2 6-4 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.