Mariano Zabaleta defeated Agustin Calleri 6-4 6-7 7-6 7-5 in the Roland Garros round of 128 on clay. The upset overturned the form book — Agustin Calleri came in leading the head-to-head 4–0, but Mariano Zabaleta had been the form player, winning 3 of their last 7 on clay. Mariano Zabaleta claimed a first win over Agustin Calleri in five meetings, narrowing the head-to-head to 4–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2003-10-06 | Vienna | R32 | hard | Agustin Calleri | 6-4 6-2 |
| 2003-05-12 | Hamburg Masters | R16 | clay | Agustin Calleri | 6-3 6-0 |
| 2003-02-24 | Acapulco | F | hard | Agustin Calleri | 7-5 3-6 6-3 |
| 2002-02-18 | Buenos Aires | QF | clay | Agustin Calleri | 6-4 4-6 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 (19 vs 103). ATP, WTA & Challenger.