Mariano Zabaleta defeated Gaston Gaudio 6-4 6-0 in the Stuttgart round of 32 on grass. The upset overturned the form book — Gaston Gaudio came in leading the head-to-head 4–2, defending last year's final. Mariano Zabaleta narrowed the head-to-head to 4–3.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2005-07-25 | Kitzbuhel | SF | clay | Gaston Gaudio | 6-1 6-1 |
| 2005-07-18 | Stuttgart | QF | grass | Gaston Gaudio | 6-4 1-6 6-2 |
| 2004-07-05 | Bastad | F | clay | Mariano Zabaleta | 6-1 4-6 7-6(4) |
| 2001-02-19 | Buenos Aires | R32 | clay | Gaston Gaudio | 6-4 6-3 |
| 2000-05-15 | Hamburg Masters | R64 | clay | Mariano Zabaleta | 6-3 6-3 |
| 1999-09-27 | Bucharest | R32 | clay | Gaston Gaudio | 6-2 6-7(5) 3-1 RET |
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 (31 vs 74). ATP, WTA & Challenger.