Ricardo Siggia defeated Diego Matos 6-4 1-6 6-2 in the Brazil F23 round of 32 on clay. The result followed the form book — Ricardo Siggia came in leading the head-to-head 3–1. Ricardo Siggia extended the head-to-head to 4–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2011-07-11 | Brazil F21 | R32 | clay | Diego Matos | 6-2 6-4 |
| 2010-09-27 | Brazil F26 | R32 | clay | Ricardo Siggia | 2-6 6-3 6-4 |
| 2009-11-02 | Brazil F26 | R32 | clay | Ricardo Siggia | 6-4 7-5 |
| 2009-05-11 | Brazil F2 | R16 | hard | Ricardo Siggia | 6-3 7-5 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.