# 2011 Brasil Open – Singles

Juan Carlos Ferrero was the defending champion; however, he chose not to defend his title due to knee and wrist injuries. Nicolás Almagro claimed the title by defeating Alexandr Dolgopolov 6–3, 7–6(3) in the final.

## Seeds

The top four seeds receive a bye into the second round.
* Nicolás Almagro (champion)
* Albert Montañés (second round)
* Thomaz Bellucci (quarterfinals)
* Alexandr Dolgopolov (final)
* Juan Ignacio Chela (semifinals)
* Tommy Robredo (second round)
* Potito Starace (quarterfinals)
* Victor Hănescu (first round)

## Draw
### Key

* Q = Qualifier
* WC = Wild card
* LL = Lucky loser
* Alt = Alternate
* SE = Special exempt
* PR = Protected ranking
* ITF = ITF entry
* JE = Junior exempt
* w/o = Walkover
* r = Retired
* d = Defaulted
* SR = Special ranking

### Finals

| Semifinals | Semifinals | Semifinals | Semifinals | Semifinals | Final | Final | Final | Final |
| 1 | Nicolás Almagro | 1 | 6 | 6 | | | | |
| 5 | Juan Ignacio Chela | 6 | 2 | 4 | | | | |
| 5 | Juan Ignacio Chela | 6 | 2 | 4 | 1 | Nicolás Almagro | 6 | 7 |
| | | | | | 4 | Alexandr Dolgopolov | 3 | 6$^3$ |
| 4 | Alexandr Dolgopolov | 6 | 6 | | 4 | Alexandr Dolgopolov | 3 | 6$^3$ |
| | Ricardo Mello | 2 | 1 | | | | | |

### Top half

| First round | First round | First round | First round | First round | Second round | Second round | Second round | Second round | Second round | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Semifinals | Semifinals | Semifinals | Semifinals | Semifinals |
| | | | | | 1 | N Almagro | 6 | 6 | | | | | | | | | | |
| WC | J Souza | 6 | 6 | | WC | J Souza | 2 | 2 | | | | | | | | | | |
| WC | G Clézar | 3 | 2 | | | | | | | 1 | N Almagro | 6 | 6 | | | | | |
| | R Machado | 6 | 6 | | | | | | | | R Machado | 2 | 4 | | | | | |
| Q | F Bagnis | 4 | 2 | | | R Machado | 6 | 6 | | | | | | | | | | |
| | F Volandri | 7 | 6 | | | F Volandri | 2 | 1 | | | | | | | | | | |
| 8 | V Hănescu | 5 | 1 | | | | | | | | | | | 1 | N Almagro | 1 | 6 | 6 |
| | | | | | | | | | | | | | | 5 | JI Chela | 6 | 2 | 4 |
| | | | | | 3 | T Bellucci | 6 | 7 | | | | | | | | | | |
| Q | A Ghem | 4 | 3 | | | C Berlocq | 4 | 5 | | | | | | | | | | |
| | C Berlocq | 6 | 6 | | | | | | | 3 | T Bellucci | 1 | 2 | | | | | |
| | Ł Kubot | 6$^5$ | 7 | 7 | | | | | | 5 | JI Chela | 6 | 6 | | | | | |
| | E Schwank | 7 | 5 | 6$^2$ | | Ł Kubot | 6 | 5 | 3 | | | | | | | | | |
| Q | R Dutra da Silva | 7 | 6$^4$ | 3 | 5 | JI Chela | 3 | 7 | 6 | | | | | | | | | |
| 5 | JI Chela | 6$^4$ | 7 | 6 | | | | | | | | | | | | | | |

### Bottom half

| First round | First round | First round | First round | First round | Second round | Second round | Second round | Second round | Second round | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Semifinals | Semifinals | Semifinals | Semifinals |
| 7 | P Starace | 6 | 5 | 6 | | | | | | | | | | | | | |
| | P Cuevas | 4 | 7 | 4 | 7 | P Starace | 6 | 7 | | | | | | | | | |
| Q | L Mayer | 4 | 6 | 7 | Q | L Mayer | 4 | 6$^9$ | | | | | | | | | |
| | I Andreev | 6 | 4 | 6$^2$ | | | | | | 7 | P Starace | 3 | 4 | | | | |
| WC | F Romboli | 4 | 2 | | | | | | | 4 | A Dolgopolov | 6 | 6 | | | | |
| | R Ramírez Hidalgo | 6 | 6 | | | R Ramírez Hidalgo | 5 | 4 | | | | | | | | | |
| | | | | | 4 | A Dolgopolov | 7 | 6 | | | | | | | | | |
| | | | | | | | | | | | | | | 4 | A Dolgopolov | 6 | 6 |
| 6 | T Robredo | 6 | 6$^4$ | 6 | | | | | | | | | | | R Mello | 2 | 1 |
| | F Fognini | 3 | 7 | 3 | 6 | T Robredo | 4 | 7 | 2 | | | | | | | | |
| | P Andújar | 6 | 6 | | | P Andújar | 6 | 5 | 6 | | | | | | | | |
| | D Gimeno Traver | 3 | 1 | | | | | | | | P Andújar | 1 | 0 | | | | |
| | S Giraldo | 4 | 3 | | | | | | | | R Mello | 6 | 6 | | | | |
| | R Mello | 6 | 6 | | | R Mello | 6 | 6 | | | | | | | | | |
| | | | | | 2 | A Montañés | 3 | 3 | | | | | | | | | |