Ricardo Siggia defeated Rodrigo Guidolin 6-2 6-3 in the Brazil F17 round of 32 on clay. The upset overturned the form book — Rodrigo Guidolin came in leading the head-to-head 3–0. Ricardo Siggia claimed a first win over Rodrigo Guidolin in four meetings, narrowing the head-to-head to 3–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2011-05-16 | Brazil F14 | R16 | clay | Rodrigo Guidolin | 6-2 6-1 |
| 2009-06-22 | Brazil F8 | R32 | clay | Rodrigo Guidolin | 7-5 6-1 |
| 2008-11-24 | Brazil F30 | R16 | clay | Rodrigo Guidolin | 6-4 6-3 |