Gaston Arturo Grimolizzi defeated Juan Manuel Valverde 6-2 3-6 6-3 in the Argentina F7 round of 16 on clay. The upset overturned the form book — Juan Manuel Valverde came in leading the head-to-head 4–0. Gaston Arturo Grimolizzi claimed a first win over Juan Manuel Valverde in five meetings, narrowing the head-to-head to 4–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2010-05-03 | Argentina F5 | R32 | clay | Juan Manuel Valverde | 2-6 6-3 6-2 |
| 2009-04-20 | Argentina F2 | R32 | clay | Juan Manuel Valverde | 5-7 6-2 6-2 |
| 2008-01-14 | Guatemala F1 | R32 | hard | Juan Manuel Valverde | 0-6 6-1 6-2 |
| 2006-05-15 | Argentina F7 | R32 | clay | Juan Manuel Valverde | 6-3 6-4 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.