# 2011 Rijeka Open – Singles

Blaž Kavčič was the defending champion, but he lost to Paolo Lorenzi 6–4, 1–6, 4–6 in the quarterfinals. Rui Machado won in the final against Grega Žemlja 6–3, 6–0.

## Seeds

* Blaž Kavčič (quarterfinals)
* Diego Junqueira (second round)
* Rui Machado (champion)
* Éric Prodon (first round)
* Paolo Lorenzi (semifinals)
* Brian Dabul (first round)
* Vincent Millot (first round)
* Grega Žemlja (final)

## 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 |
| 5 | Paolo Lorenzi | 6 | 4 | 4 | | | | |
| 8 | Grega Žemlja | 4 | 6 | 6 | | | | |
| 8 | Grega Žemlja | 4 | 6 | 6 | 8 | Grega Žemlja | 3 | 0 |
| | | | | | 3 | Rui Machado | 6 | 6 |
| 3 | Rui Machado | 6 | 6 | | 3 | Rui Machado | 6 | 6 |
| | Simone Vagnozzi | 2 | 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 | B Kavčič | 6 | 7 | | | | | | | | | | | | | | | |
| | F Dancevic | 4 | 5 | | 1 | B Kavčič | 6 | 7 | | | | | | | | | | |
| Q | G Trujillo-Soler | 6 | 6 | | Q | G Trujillo-Soler | 3 | 5 | | | | | | | | | | |
| | A Gensse | 3 | 3 | | | | | | 1 | B Kavčič | 6 | 1 | 4 | | | | | |
| | O Patience | 3 | 4 | | | | | | 5 | P Lorenzi | 4 | 6 | 6 | | | | | |
| Q | P Sousa | 6 | 6 | | Q | P Sousa | 4 | 0 | | | | | | | | | | |
| WC | N Mektić | 3 | 4 | | 5 | P Lorenzi | 6 | 6 | | | | | | | | | | |
| 5 | P Lorenzi | 6 | 6 | | | | | | | | | | | 5 | P Lorenzi | 6 | 4 | 4 |
| 4 | É Prodon | 4 | 6 | 5$^r$ | | | | | | | | | | 8 | G Žemlja | 4 | 6 | 6 |
| WC | K Mesaroš | 6 | 2 | 6 | WC | K Mesaroš | 6 | 6 | | | | | | | | | | |
| | A Balázs | 6 | 6 | | | A Balázs | 3 | 1 | | | | | | | | | | |
| | J Silva | 1 | 2 | | | | | | WC | K Mesaroš | 1 | 5 | | | | | | |
| | F Bagnis | 6 | 4 | 2 | | | | | 8 | G Žemlja | 6 | 7 | | | | | | |
| Alt | A Veić | 4 | 6 | 6 | Alt | A Veić | 4 | 3 | | | | | | | | | | |
| | A di Mauro | 4 | 0 | r | 8 | G Žemlja | 6 | 6 | | | | | | | | | | |
| 8 | G Žemlja | 6 | 3 | | | | | | | | | | | | | | | |

### Bottom 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 |
| 6 | B Dabul | 6$^1$ | 4 | | | | | | | | | | | | | | |
| WC | B Puc | 7 | 6 | | WC | B Puc | 1 | 2 | | | | | | | | | |
| | A Ungur | 6 | 6 | | | A Ungur | 6 | 6 | | | | | | | | | |
| | M Viola | 4 | 2 | | | | | | | A Ungur | 6 | 3 | 1 | | | | |
| | J Zopp | 2 | | | | | | | 3 | R Machado | 4 | 6 | 6 | | | | |
| | Á Kellner | 0$^r$ | | | | J Zopp | 4 | 2 | | | | | | | | | |
| WC | D Marcan | 2 | 3 | | 3 | R Machado | 6 | 6 | | | | | | | | | |
| 3 | R Machado | 6 | 6 | | | | | | | | | | | 3 | R Machado | 6 | 6 |
| 7 | V Millot | 2 | 4 | | | | | | | | | | | | S Vagnozzi | 2 | 2 |
| | S Vagnozzi | 6 | 6 | | | S Vagnozzi | 6 | 6 | | | | | | | | | |
| | D Guez | 6 | 6 | | | D Guez | 2 | 0 | | | | | | | | | |
| | JP Brzezicki | 1 | 1 | | | | | | | S Vagnozzi | 4 | 6 | 7 | | | | |
| Q | Andrea Arnaboldi | 1 | 6 | 6$^4$ | | | | | | A Molteni | 6 | 2 | 6$^3$ | | | | |
| | A Molteni | 6 | 4 | 7 | | A Molteni | 6 | 7 | | | | | | | | | |
| Q | N Devilder | 1 | 2 | | 2 | D Junqueira | 3 | 5 | | | | | | | | | |
| 2 | D Junqueira | 6 | 6 | | | | | | | | | | | | | | |