Antonio Pastorino defeated Gaston Giussani 4-6 6-4 6-2 in the Argentina F10 round of 32 on clay. The upset overturned the form book — Gaston Giussani came in leading the head-to-head 1–0, but Antonio Pastorino had been the form player, winning 5 of their last 10 on clay. Antonio Pastorino claimed a first win over Gaston Giussani in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2009-08-24 | Bolivia F1 | SF | clay | Gaston Giussani | 4-6 6-2 6-3 |