Rodrigo Guidolin defeated Ronaldo Carvalho 6-2 7-6 in the Brazil F4RIO QUENTEGOLAS round of 32 on hard. The upset overturned the form book — Ronaldo Carvalho came in leading the head-to-head 2–0. Rodrigo Guidolin claimed a first win over Ronaldo Carvalho in three meetings, narrowing the head-to-head to 2–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2005-08-15 | Brazil F6 | QF | hard | Ronaldo Carvalho | 6-3 6-4 |
| 2005-02-28 | Brazil F2 | R32 | clay | Ronaldo Carvalho | 6-4 6-1 |