# 2011 Città di Caltanissetta – Singles

Robin Haase was the defending champion, but chose not to compete. Andreas Haider-Maurer won the title, defeating Matteo Viola in the final.

## Seeds

* Filippo Volandri (second round)
* Denis Gremelmayr (first round)
* Andreas Haider-Maurer (champion)
* Benoît Paire (first round)
* Simon Greul (first round)
* Alessio di Mauro (first round)
* Bastian Knittel (second round)
* David Guez (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

### Final four

| Semifinals | Semifinals | Semifinals | Semifinals | Semifinals | Final | Final | Final | Final |
| | Adrian Ungur | 3 | 7 | 4 | | | | |
| 3 | Andreas Haider-Maurer | 6 | 6$^3$ | 6 | | | | |
| 3 | Andreas Haider-Maurer | 6 | 6$^3$ | 6 | 3 | Andreas Haider-Maurer | 6 | 7 |
| | | | | | | Matteo Viola | 1 | 6$^1$ |
| | Matteo Viola | 6 | 6 | | | Matteo Viola | 1 | 6$^1$ |
| | Adrián Menéndez | 4 | 2 | | | | | |

### 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 | F Volandri | 1 | 6 | 6 | | | | | | | | | | | | | | |
| | N Ćirić | 6 | 3 | 1 | 1 | F Volandri | 4 | 0 | | | | | | | | | | |
| | A Ungur | 6 | 6 | | | A Ungur | 6 | 6 | | | | | | | | | | |
| | J Martí | 2 | 2 | | | | | | | | A Ungur | 6 | 7 | | | | | |
| | Andrea Arnaboldi | 6$^9$ | 4 | | | | | | | | T Schoorel | 3 | 5 | | | | | |
| | T Schoorel | 7 | 6 | | | T Schoorel | 6 | 6 | | | | | | | | | | |
| | Alexander Flock | 4 | 2 | | 7 | B Knittel | 3 | 1 | | | | | | | | | | |
| 7 | B Knittel | 6 | 6 | | | | | | | | | | | | A Ungur | 3 | 7 | 4 |
| 3 | A Haider-Maurer | 6 | 6 | | | | | | | | | | | 3 | A Haider-Maurer | 6 | 6$^3$ | 6 |
| | F Dustov | 3 | 1 | | 3 | A Haider-Maurer | 5 | 6 | 6 | | | | | | | | | |
| Q | A van der Duim | 7 | 6 | | Q | A van der Duim | 7 | 2 | 3 | | | | | | | | | |
| WC | F Aldi | 5 | 0 | | | | | | | 3 | A Haider-Maurer | 6 | 6 | | | | | |
| Q | Enrico Burzi | 4 | 4 | | | | | | | | G Naso | 3 | 4 | | | | | |
| | G Naso | 6 | 6 | | | G Naso | 7 | 6 | | | | | | | | | | |
| | S Vagnozzi | 6 | 6 | | | S Vagnozzi | 5 | 4 | | | | | | | | | | |
| 5 | S Greul | 2 | 1 | | | | | | | | | | | | | | | |

### 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 |
| 6 | A di Mauro | 6$^7$ | 1 | | | | | | | | | | | | | | |
| WC | S Galvani | 7 | 6 | | WC | S Galvani | 6 | 2 | | | | | | | | | |
| | P Santos | 2 | 4 | | | J Eysseric | 4 | 0$^r$ | | | | | | | | | |
| | J Eysseric | 6 | 6 | | | | | | | WC | S Galvani | 6 | 2 | 4 | | | |
| | D Giorgini | 5 | 6 | 6$^3$ | | | | | | | M Viola | 3 | 6 | 6 | | | |
| | M Trevisan | 7 | 2 | 7 | | M Trevisan | 3 | 6 | 5 | | | | | | | | |
| | M Viola | 6 | 7 | | | M Viola | 6 | 4 | 7 | | | | | | | | |
| 4 | B Paire | 0 | 6$^3$ | | | | | | | | | | | | M Viola | 6 | 6 |
| 8 | D Guez | 3 | 1 | | | | | | | | | | | | A Menéndez | 4 | 2 |
| Q | A Bedene | 6 | 6 | | Q | A Bedene | 7 | 5 | 6 | | | | | | | | |
| WC | D Bracciali | 0 | 5 | | | P Carreño Busta | 6$^1$ | 7 | 3 | | | | | | | | |
| | P Carreño Busta | 6 | 7 | | | | | | | Q | A Bedene | 7 | 3 | 6$^5$ | | | |
| Q | Filippo Leonardi | 4 | 6$^2$ | | | | | | | | A Menéndez | 6$^4$ | 6 | 7 | | | |
| | A Brizzi | 6 | 7 | | | A Brizzi | 5 | 7 | 6$^3$ | | | | | | | | |
| | A Menéndez | 2 | 6 | 6 | | A Menéndez | 7 | 5 | 7 | | | | | | | | |
| 2 | D Gremelmayr | 6 | 4 | 4 | | | | | | | | | | | | | |