Mariano Puerta defeated Felix Mantilla 6-0 6-2 in the Gstaad round of 16 on clay. The upset overturned the form book — Felix Mantilla came in leading the head-to-head 3–2, defending last year's semi-final. Mariano Puerta narrowed the head-to-head to 3–3.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2005-05-16 | St. Poelten | R16 | clay | Felix Mantilla | 7-6(2) 4-6 7-5 |
| 2005-02-21 | Acapulco | QF | hard | Mariano Puerta | 6-4 3-6 7-6(5) |
| 2003-04-21 | Barcelona | R64 | clay | Felix Mantilla | 7-6(8) 6-3 |
| 2000-03-06 | Bogota | QF | hard | Mariano Puerta | 7-6(2) 6-3 |
| 1999-05-24 | Roland Garros | R64 | clay | Felix Mantilla | 7-5 6-4 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 (161 vs 200). ATP, WTA & Challenger.