Joaquin Jesus Monteferrario defeated Juan Pablo Villar 4-6 6-3 6-3 in the Argentina F6 round of 16 on clay. The upset overturned the form book — Juan Pablo Villar came in leading the head-to-head 2–0. Joaquin Jesus Monteferrario claimed a first win over Juan Pablo Villar in three meetings, narrowing the head-to-head to 2–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2010-08-30 | Brazil F22 | R16 | clay | Juan Pablo Villar | 7-5 6-3 |
| 2009-11-16 | Argentina F24 | R16 | clay | Juan Pablo Villar | 6-3 6-1 |