Nicolas Almagro defeated Mariano Zabaleta 6-7 6-4 6-4 in the Buenos Aires round of 16 on clay. The upset overturned the form book — Mariano Zabaleta came in leading the head-to-head 2–1, defending last year's quarter-final. Nicolas Almagro narrowed the head-to-head to 2–2.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2007-07-30 | Sopot | R32 | clay | Mariano Zabaleta | 6-3 7-5 |
| 2007-02-26 | Acapulco | R32 | hard | Nicolas Almagro | 6-3 6-4 |
| 2005-07-25 | Kitzbuhel | R16 | clay | Mariano Zabaleta | 6-3 4-6 6-3 |
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 67). ATP, WTA & Challenger.