Mariano Zabaleta defeated Albert Costa 7-5 6-2 in the Hamburg Masters round of 32 on clay. The upset overturned the form book — Albert Costa came in leading the head-to-head 4–0, defending the title. Mariano Zabaleta claimed a first win over Albert Costa in five meetings, narrowing the head-to-head to 4–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2004-07-12 | Stuttgart | R16 | grass | Albert Costa | 7-5 7-6(4) |
| 2003-10-27 | Paris Masters | R64 | hard | Albert Costa | 6-7(4) 6-4 7-5 |
| 2003-04-21 | Barcelona | R32 | clay | Albert Costa | 6-3 7-5 |
| 1999-04-19 | Monte Carlo Masters | R64 | clay | Albert Costa | 6-3 6-4 |
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 (200 vs 200). ATP, WTA & Challenger.