# 2011 Santos Brasil Tennis Open – Singles

João Souza became the champion after beating Diego Junqueira in straight sets 6–4, 6–2.

## Seeds

* Ricardo Mello (semifinals)
* Marcos Daniel (first round)
* Éric Prodon (second round)
* Tatsuma Ito (second round, retired due to cramping)
* Diego Junqueira (final)
* Leonardo Mayer (quarterfinals)
* João Souza (champion)
* Juan Pablo Brzezicki (semifinals, retired)

## 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 | Ricardo Mello | 2 | 6 | 3 | | | | |
| 7 | João Souza | 6 | 1 | 6 | | | | |
| 7 | João Souza | 6 | 1 | 6 | 7 | João Souza | 6 | 6 |
| | | | | | 5 | Diego Junqueira | 4 | 2 |
| 8 | Juan Pablo Brzezicki | 3 | 0$^r$ | | 5 | Diego Junqueira | 4 | 2 |
| 5 | Diego Junqueira | 6 | 2 | | | | | |

### Top half

| First round | First round | First round | First round | First round | Second round | Second round | Second round | Second round | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Semifinals | Semifinals | Semifinals | Semifinals | Semifinals |
| 1 | R Mello | 3 | 6 | 6 | | | | | | | | | | | | | | |
| | F Romboli | 6 | 4 | 4 | 1 | R Mello | 6 | 6 | | | | | | | | | | |
| WC | J Pereira | 6 | 6 | | WC | J Pereira | 1 | 3 | | | | | | | | | | |
| WC | D Dutra da Silva | 1 | 1 | | | | | | 1 | R Mello | 4 | 6 | 6 | | | | | |
| | P Galdón | 1 | 4 | | | | | | 6 | L Mayer | 6 | 3 | 4 | | | | | |
| | J Silva | 6 | 6 | | | J Silva | 4 | 3 | | | | | | | | | | |
| Q | T-h Yang | 3 | 6 | 2 | 6 | L Mayer | 6 | 6 | | | | | | | | | | |
| 6 | L Mayer | 6 | 2 | 6 | | | | | | | | | | 1 | R Mello | 2 | 6 | 3 |
| 3 | É Prodon | 7 | 6 | | | | | | | | | | | 7 | J Souza | 6 | 1 | 6 |
| | I Belyaev | 6$^2$ | 3 | | 3 | É Prodon | 6$^1$ | 4 | | | | | | | | | | |
| WC | Daniel Bustamante | 1 | 2 | | | S Decoud | 7 | 6 | | | | | | | | | | |
| | S Decoud | 6 | 6 | | | | | | | S Decoud | 2 | 7 | 3 | | | | | |
| | F Bagnis | 6 | 2 | 4 | | | | | 7 | J Souza | 6 | 6$^3$ | 6 | | | | | |
| | A Molteni | 2 | 6 | 6 | | A Molteni | 5 | 6$^3$ | | | | | | | | | | |
| SE | M Demoliner | 4 | 3 | | 7 | J Souza | 7 | 7 | | | | | | | | | | |
| 7 | J Souza | 6 | 6 | | | | | | | | | | | | | | | |

### Bottom half

| First round | First round | First round | First round | Second round | Second round | Second round | Second round | Second round | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Semifinals | Semifinals | Semifinals | Semifinals |
| 8 | JP Brzezicki | 6 | 6 | | | | | | | | | | | | | | |
| | T Alves | 4 | 1 | 8 | JP Brzezicki | 6 | 6 | | | | | | | | | | |
| Q | J Martí | 6 | 6 | Q | J Martí | 1 | 3 | | | | | | | | | | |
| Q | A Ghem | 2 | 3 | | | | | | 8 | JP Brzezicki | 1 | 6 | 6 | | | | |
| | L Tavares | 0$^r$ | | | | | | | | Y Sugita | 6 | 3 | 2 | | | | |
| | Y Sugita | 2 | | | Y Sugita | 7 | 4 | 3 | | | | | | | | | |
| | C Zampieri | 6$^5$ | 3 | 4 | T Ito | 5 | 6 | 1$^r$ | | | | | | | | | |
| 4 | T Ito | 7 | 6 | | | | | | | | | | | 8 | JP Brzezicki | 3 | 0$^r$ |
| 5 | D Junqueira | 7 | 6 | | | | | | | | | | | 5 | D Junqueira | 6 | 2 |
| WC | C Lindell | 5 | 1 | 5 | D Junqueira | 6 | 6 | | | | | | | | | | |
| | M Jaziri | 7 | 7 | | M Jaziri | 3 | 2 | | | | | | | | | | |
| | N Massú | 5 | 5 | | | | | | 5 | D Junqueira | 6 | | | | | | |
| | R Hocevar | 3 | 4 | | | | | | SE | A Bedene | 4$^r$ | | | | | | |
| SE | A Bedene | 6 | 6 | SE | A Bedene | 6 | 6 | | | | | | | | | | |
| Q | I Miranda | 6 | 6 | Q | I Miranda | 4 | 2 | | | | | | | | | | |
| 2 | M Daniel | 4 | 4 | | | | | | | | | | | | | | |