Joaquin Jesus Monteferrario defeated Guillermo Duran 6-3 6-3 in the Argentina F2 round of 32 on clay. The upset overturned the form book — Guillermo Duran came in leading the head-to-head 3–1. Joaquin Jesus Monteferrario narrowed the head-to-head to 3–2.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2012-12-03 | Argentina F28 | R32 | clay | Guillermo Duran | 6-1 6-1 |
| 2012-08-27 | Argentina F22 | R16 | clay | Joaquin Jesus Monteferrario | 4-6 6-2 7-5 |
| 2011-06-20 | Argentina F8 | R32 | clay | Guillermo Duran | 6-1 6-2 |
| 2011-06-06 | Argentina F6 | SF | clay | Guillermo Duran | 6-4 6-4 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.