Rodrigo Guidolin defeated Guilherme Clezar 7-6 7-5 in the Brazil F9 semi-final on clay. The upset overturned the form book — Guilherme Clezar came in leading the head-to-head 3–1, but Rodrigo Guidolin had been the form player, winning 6 of their last 10 on clay. Rodrigo Guidolin narrowed the head-to-head to 3–2.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2011-05-23 | Brazil F15 | F | clay | Guilherme Clezar | 6-4 1-6 6-3 |
| 2011-05-16 | Brazil F14 | QF | clay | Guilherme Clezar | 6-2 6-7(4) 4-0 |
| 2010-11-01 | Brazil F31 | R16 | clay | Guilherme Clezar | 7-6(3) 6-4 |
| 2010-07-19 | Brazil F16 | R16 | clay | Rodrigo Guidolin | 6-1 6-3 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.