Marcos Conocente defeated Guido Pella 4-6 6-4 6-1 in the Argentina F16 round of 16 on clay. The upset overturned the form book — Guido Pella came in leading the head-to-head 5–0, but Marcos Conocente had been the form player, winning 2 of their last 4 on clay. Marcos Conocente claimed a first win over Guido Pella in six meetings, narrowing the head-to-head to 5–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2009-05-25 | Argentina F7 | R32 | clay | Guido Pella | 6-1 6-1 |
| 2009-05-04 | Argentina F4 | QF | clay | Guido Pella | 6-2 6-4 |
| 2009-04-13 | Argentina F1 | R16 | clay | Guido Pella | 6-4 6-4 |
| 2008-11-03 | Argentina F15 | QF | clay | Guido Pella | 6-2 6-4 |
| 2007-10-08 | Argentina F18 | R32 | clay | Guido Pella | 6-2 3-6 6-2 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.