Jonathan Gonzalia defeated Damian Guichonet 6-4 7-5 in the Argentina F25 round of 16 on clay. The upset overturned the form book — Damian Guichonet came in leading the head-to-head 1–0, but Jonathan Gonzalia had been the form player, winning 6 of their last 10 on clay. Jonathan Gonzalia claimed a first win over Damian Guichonet in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2008-10-27 | Argentina F14 | R32 | clay | Damian Guichonet | 6-3 4-6 6-2 |