Alberto Martin defeated Mariano Zabaleta 7-6 6-4 in the Costa Do Sauipe quarter-final on hard. The upset overturned the form book — Mariano Zabaleta came in leading the head-to-head 3–0, defending last year's round of 32. Alberto Martin claimed a first win over Mariano Zabaleta in four meetings, narrowing the head-to-head to 3–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2004-07-05 | Bastad | QF | clay | Mariano Zabaleta | 6-1 6-2 |
| 2002-07-22 | Kitzbuhel | R32 | clay | Mariano Zabaleta | 6-7(3) 6-3 6-4 |
| 2001-02-12 | Vina del Mar | QF | clay | Mariano Zabaleta | 6-4 6-1 |
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 (154 vs 67). ATP, WTA & Challenger.