Mariano Zabaleta defeated Ruben Ramirez Hidalgo 6-3 4-6 6-1 in the Vina del Mar round of 16 on clay. The upset overturned the form book — Ruben Ramirez Hidalgo came in leading the head-to-head 1–0, defending last year's round of 32. Mariano Zabaleta claimed a first win over Ruben Ramirez Hidalgo in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2004-03-01 | Acapulco | R16 | hard | Ruben Ramirez Hidalgo | 7-5 6-3 |
Each player's serve crossed against the other's return, converted to expected hold of serve. Recent completed matches, ATP, WTA & Challenger. About
Averages over each player's completed matches in the selected window (114 vs 200). ATP, WTA & Challenger.