# 2011 Copa Petrobras Montevideo – Singles

Máximo González was the defending champion, but he lost in the final 2–6, 5–7 against Carlos Berlocq.

## Seeds

* Carlos Berlocq (champion)
* Leonardo Mayer (semifinals)
* Diego Junqueira (second round)
* João Souza (quarterfinals)
* Rogério Dutra da Silva (quarterfinals)
* Máximo González (final)
* Wayne Odesnik (first round)
* Alessandro Giannessi (semifinals)

## 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 | Final | Final | Final | Final |
| 1 | Carlos Berlocq | 6 | 6 | | | | |
| 8 | Alessandro Giannessi | 2 | 2 | | | | |
| 8 | Alessandro Giannessi | 2 | 2 | 1 | Carlos Berlocq | 6 | 7 |
| | | | | 6 | Máximo González | 2 | 5 |
| 6 | Máximo González | 6 | 7 | 6 | Máximo González | 2 | 5 |
| 2 | Leonardo Mayer | 3 | 5 | | | | |

### 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 | Quarterfinals | Semifinals | Semifinals | Semifinals | Semifinals |
| 1 | C Berlocq | 7$^7$ | 3 | 6 | | | | | | | | | | | | | | |
| | G Naso | 6$^4$ | 6 | 0 | 1 | C Berlocq | 6$^7$ | 6 | 6 | | | | | | | | | |
| Q | A Fabbri | 6$^4$ | 6$^4$ | | | P Červenák | 7$^9$ | 3 | 3 | | | | | | | | | |
| | P Červenák | 7$^7$ | 7$^7$ | | | | | | | 1 | C Berlocq | 7$^9$ | 4 | 6 | | | | |
| | F Bagnis | 3 | 7$^7$ | 7 | | | | | | | F Bagnis | 6$^7$ | 6 | 0 | | | | |
| | F Argüello | 6 | 6$^4$ | 5 | | F Bagnis | 7$^8$ | 6 | | | | | | | | | | |
| Q | A Velotti | 6 | 6 | | Q | A Velotti | 6$^6$ | 2 | | | | | | | | | | |
| 7 | W Odesnik | 3 | 2 | | | | | | | | | | | | 1 | C Berlocq | 6 | 6 |
| 4 | J Souza | 6 | 6 | | | | | | | | | | | | 8 | A Giannessi | 2 | 2 |
| WC | T Fernandes | 3 | 1 | | 4 | J Souza | 6 | 6 | | | | | | | | | | |
| | Axel Michon | 5 | 7 | 2 | | M Felder | 3 | 0 | | | | | | | | | | |
| | M Felder | 7 | 5 | 6 | | | | | | 4 | J Souza | 3 | 3 | | | | | |
| WC | M Cuevas | 7$^8$ | 2 | 7$^7$ | | | | | | 8 | A Giannessi | 6 | 6 | | | | | |
| | G Elias | 6$^6$ | 6 | 6$^4$ | WC | M Cuevas | 4 | 7 | 4 | | | | | | | | | |
| | J Duckworth | 4 | 4 | | 8 | A Giannessi | 6 | 5 | 6 | | | | | | | | | |
| 8 | A Giannessi | 6 | 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 |
| 6 | M González | 6 | 6 | | | | | | | | | | | | | | |
| WC | D Hidalgo | 1 | 2 | | 6 | M González | 6 | 6 | | | | | | | | | |
| | A di Mauro | 6 | 6 | | | A di Mauro | 2 | 0 | | | | | | | | | |
| Q | Diego Schwartzman | 4 | 3 | | | | | | | 6 | M González | 7$^7$ | 6 | | | | |
| WC | N Massú | 3 | 4 | | | | | | | | A Kuznetsov | 6$^2$ | 2 | | | | |
| | A Kuznetsov | 6 | 6 | | | A Kuznetsov | 6 | 6 | | | | | | | | | |
| Q | R Olivo | 2 | 2 | | 3 | D Junqueira | 3 | 4 | | | | | | | | | |
| 3 | D Junqueira | 6 | 6 | | | | | | | | | | | 6 | M González | 6 | 7 |
| 5 | R Dutra da Silva | 6 | 6 | | | | | | | | | | | 2 | L Mayer | 3 | 5 |
| | M Alund | 3 | 3 | | 5 | R Dutra da Silva | 6 | 6 | | | | | | | | | |
| | N Ćirić | 6 | 6 | | | N Ćirić | 3 | 1 | | | | | | | | | |
| | P Galdón | 1 | 2 | | | | | | | 5 | R Dutra da Silva | 4 | 3 | | | | |
| | JP Brzezicki | 5 | 6 | 6 | | | | | | 2 | L Mayer | 6 | 6 | | | | |
| | G Rufin | 7 | 4 | 2 | | JP Brzezicki | 7 | 3 | 2 | | | | | | | | |
| | A Molteni | 3 | 3 | | 2 | L Mayer | 5 | 6 | 6 | | | | | | | | |
| 2 | L Mayer | 6 | 6 | | | | | | | | | | | | | | |