Nicolas Santos defeated Joaquin Jesus Monteferrario 6-4 6-7 6-3 in the Brazil F20 qualifying round on clay. The upset overturned the form book — Joaquin Jesus Monteferrario came in leading the head-to-head 2–0, but Nicolas Santos had been the form player, winning 6 of their last 10 on clay. Nicolas Santos claimed a first win over Joaquin Jesus Monteferrario in three meetings, narrowing the head-to-head to 2–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2012-10-22 | Brazil F31 | R16 | clay | Joaquin Jesus Monteferrario | 6-4 2-6 7-5 |
| 2010-08-30 | Brazil F22 | R32 | clay | Joaquin Jesus Monteferrario | 3-6 6-4 6-3 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.