Joaquin Jesus Monteferrario defeated Juan Carlos Saez 6-3 6-0 in the Bolivia F1 round of 16 on clay. The upset overturned the form book — Juan Carlos Saez came in leading the head-to-head 1–0. Joaquin Jesus Monteferrario claimed a first win over Juan Carlos Saez in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2010-12-13 | Chile F9 | R16 | clay | Juan Carlos Saez | 3-6 6-1 6-4 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.