Oscar Martinez Dieguez defeated Ruben Ramirez Hidalgo 7-6 6-3 in the Spain 5 Masters 2 round of 16 on clay. The upset overturned the form book — Ruben Ramirez Hidalgo came in leading the head-to-head 2–1, but Oscar Martinez Dieguez had been the form player, winning 5 of their last 9 on clay. Oscar Martinez Dieguez 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 |
| 1999-07-19 | Spain F3 | QF | clay | Ruben Ramirez Hidalgo | 7-5 6-4 |
| 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.