Head to head
3
Clay
4
Mariano Zabaleta's wins on the left · Gaston Gaudio's on the right · bar lengths share one scale
Momentum
Running lead across all meetings, oldest to newest (walkovers excluded).
All meetings (7)
| 2006 | Stuttgart | Clay | R32 | Mariano Zabaleta | 6-4 6-0 |
| 2005 | Kitzbuhel | Clay | SF | Gaston Gaudio | 6-1 6-1 |
| 2005 | Stuttgart | Clay | QF | Gaston Gaudio | 6-4 1-6 6-2 |
| 2004 | Bastad | Clay | F | Mariano Zabaleta | 6-1 4-6 7-6(4) |
| 2001 | Buenos Aires | Clay | R32 | Gaston Gaudio | 6-4 6-3 |
| 2000 | Hamburg Masters | Clay | R64 | Mariano Zabaleta | 6-3 6-3 |
| 1999 | Bucharest | Clay | R32 | Gaston Gaudio | 6-2 6-7(5) 3-1 RET |
Methodology
Head-to-head totals and surface splits exclude walkovers (no match was played), which follows ATP convention — walkover meetings still appear in the match list. The momentum chart plots the running lead across all counted meetings, oldest to newest.