Gaston Gaudio defeated Guillermo Coria 6-3 7-6 in the Buenos Aires quarter-final on clay. The upset overturned the form book — Guillermo Coria came in leading the head-to-head 4–1, but Gaston Gaudio had been the form player, winning 2 of their last 7 on clay. Gaston Gaudio narrowed the head-to-head to 4–2.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2004-05-24 | Roland Garros | F | clay | Gaston Gaudio | 0-6 3-6 6-4 6-1 8-6 |
| 2003-05-17 | Hamburg | SF | clay | Guillermo Coria | 6-3 6-7(3) 6-0 |
| 2003-05-12 | Hamburg Masters | SF | clay | Guillermo Coria | 6-3 6-7 6-0 |
| 2003-02-17 | Buenos Aires | SF | clay | Guillermo Coria | 6-3 1-6 6-3 |
| 2001-02-12 | Vina del Mar | F | clay | Guillermo Coria | 4-6 6-2 7-5 |
Averages over each player's completed matches in the selected window (200 vs 200). ATP, WTA & Challenger.
Each player's serve crossed against the other's return, converted to expected hold of serve. Recent completed matches, ATP, WTA & Challenger. About