Guillermo Duran defeated Federico Cavallero 6-2 4-6 6-4 in the Argentina F10 round of 32 on clay. The upset overturned the form book — Federico Cavallero came in leading the head-to-head 1–0. Guillermo Duran claimed a first win over Federico Cavallero in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2007-09-17 | Bolivia F2 | R16 | clay | Federico Cavallero | 6-3 6-2 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.