# 2011 Poznań Porsche Open – Singles

Denis Gremelmayr was the defending champion. Vincent Millot defeated him in the second round. Rui Machado won the final 6–3, 6–3, against Jerzy Janowicz.

## Seeds

* Łukasz Kubot (second round, retired due to wrist injury)
* Frederico Gil (first round)
* Rui Machado (champion)
* Éric Prodon (second round)
* Stéphane Robert (semifinals)
* Dustin Brown (second round)
* Denis Gremelmayr (second round)
* Jaroslav Pospíšil (second 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 | Final | Final | Final | Final |
| | Jerzy Janowicz | 6 | 6 | | | | |
| 5 | Stéphane Robert | 3 | 4 | | | | |
| 5 | Stéphane Robert | 3 | 4 | | Jerzy Janowicz | 3 | 3 |
| | | | | 3 | Rui Machado | 6 | 6 |
| 3 | Rui Machado | 7 | 7 | 3 | Rui Machado | 6 | 6 |
| | Yuri Schukin | 6$^4$ | 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 | Semifinals | Semifinals | Semifinals | Semifinals |
| 1/WC | Ł Kubot | 4 | 6 | 7$^7$ | | | | | | | | | | | | | |
| Q | K Čapkovič | 6 | 3 | 6$^5$ | 1/WC | Ł Kubot | | | | | | | | | | | |
| | M Crugnola | 6 | 6 | | | M Crugnola | w/o | | | | | | | | | | |
| | M Przysiężny | 3 | 4 | | | | | | | | M Crugnola | 3 | 3 | | | | |
| | J Janowicz | 6 | 6 | | | | | | | | J Janowicz | 6 | 6 | | | | |
| | A Molteni | 1 | 4 | | | J Janowicz | 6 | 6 | | | | | | | | | |
| Q | N Renavand | 6 | 3 | 6$^3$ | 8 | J Pospíšil | 3 | 4 | | | | | | | | | |
| 8 | J Pospíšil | 3 | 6 | 7$^7$ | | | | | | | | | | | J Janowicz | 6 | 6 |
| 4 | É Prodon | 2 | 6 | 6 | | | | | | | | | | 5 | S Robert | 3 | 4 |
| WC | M Gawron | 6 | 1 | 0 | 4 | É Prodon | 6 | 1 | 6$^8$ | | | | | | | | |
| | A Gensse | 6 | 7 | | | A Gensse | 2 | 6 | 7$^{10}$ | | | | | | | | |
| | JP Brzezicki | 4 | 5 | | | | | | | | A Gensse | 3 | 2 | | | | |
| | I Klec | 3 | 6 | 6$^5$ | | | | | | 5 | S Robert | 6 | 6 | | | | |
| | P Luczak | 6 | 4 | 7$^7$ | | P Luczak | 2 | 3 | | | | | | | | | |
| | B Phau | 6 | 1 | 5 | 5 | S Robert | 6 | 6 | | | | | | | | | |
| 5 | S Robert | 4 | 6 | 7 | | | | | | | | | | | | | |

### 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 | Quarterfinals | Semifinals | Semifinals | Semifinals | Semifinals |
| 7 | D Gremelmayr | 6 | 5 | 6 | | | | | | | | | | | | | | |
| | I Minář | 1 | 7 | 4 | 7 | D Gremelmayr | 3 | 4 | | | | | | | | | | |
| | V Millot | 6 | 0 | 6 | | V Millot | 6 | 6 | | | | | | | | | | |
| Q | A Ghem | 3 | 6 | 1 | | | | | | | V Millot | 6 | 2 | 1 | | | | |
| | J Hájek | 6 | 6 | | | | | | | 3 | R Machado | 4 | 6 | 6 | | | | |
| WC | Piotr Gadomski | 4 | 4 | | | J Hájek | 2 | 1 | | | | | | | | | | |
| | T Gabashvili | 4 | 4 | | 3 | R Machado | 6 | 6 | | | | | | | | | | |
| 3 | R Machado | 6 | 6 | | | | | | | | | | | | 3 | R Machado | 7 | 7 |
| 6 | D Brown | 6 | 4 | 6 | | | | | | | | | | | | Y Schukin | 6$^4$ | 5 |
| Q | T Bednarek | 3 | 6 | 4 | 6 | D Brown | 7 | 4 | 3 | | | | | | | | | |
| | S Greul | 3 | 2 | | | D Lojda | 5 | 6 | 6 | | | | | | | | | |
| | D Lojda | 6 | 6 | | | | | | | | D Lojda | 4 | 3 | | | | | |
| WC | Bartosz Sawicki | 1 | 0 | | | | | | | | Y Schukin | 6 | 6 | | | | | |
| | Y Schukin | 6 | 6 | | | Y Schukin | 6 | 6 | | | | | | | | | | |
| | Andrea Arnaboldi | 6 | 6$^2$ | 6 | | A Arnaboldi | 4 | 3 | | | | | | | | | | |
| 2 | F Gil | 2 | 7$^7$ | 1 | | | | | | | | | | | | | | |