Gaston Gaudio defeated Rafael Serpa Guinazu 6-2 6-2 in the Uruguay Paraguay Masters 2 round of 16 on clay. The upset overturned the form book — Rafael Serpa Guinazu came in leading the head-to-head 1–0. Gaston Gaudio claimed a first win over Rafael Serpa Guinazu in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 1996-03-30 | Brazil 1 Masters 3 | R32 | clay | Rafael Serpa Guinazu | 6-4 6-2 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.