# 2011 Concurso Internacional de Tenis – San Sebastián – Singles

Albert Ramos was the defending champion. He won for the second consecutive year, defeating Pere Riba in the final 6–1, 6–2.

## Seeds

* Albert Ramos (champion)
* Pere Riba (final)
* Daniel Gimeno-Traver (semifinals)
* Thiemo de Bakker (first round)
* Benoît Paire (first round)
* Augustin Gensse (second round, retired)
* Guillermo Olaso (first round, retired due to fever)
* Roberto Bautista-Agut (quarterfinals)

## 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 | Albert Ramos | 6 | 6 | | | | |
| 3 | Daniel Gimeno-Traver | 4 | 4 | | | | |
| 3 | Daniel Gimeno-Traver | 4 | 4 | 1 | Albert Ramos | 6 | 6 |
| | | | | 2 | Pere Riba | 1 | 2 |
| | Simone Vagnozzi | 0 | 2 | 2 | Pere Riba | 1 | 2 |
| 2 | Pere Riba | 6 | 6 | | | | |

### 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 | A Ramos | 6 | 6 | | | | | | | | | | | | | | | |
| | J Martí | 3 | 1 | | 1 | A Ramos | 6$^5$ | 6 | 7$^7$ | | | | | | | | | |
| | G Alcaide | 6 | 6 | | | G Alcaide | 7$^7$ | 3 | 6$^5$ | | | | | | | | | |
| | J Eysseric | 2 | 4 | | | | | | | 1 | A Ramos | 1 | 6 | 6 | | | | |
| Q | G Fraile | 6 | 6 | | | | | | | 8 | R Bautista-Agut | 6 | 4 | 1 | | | | |
| WC | Albert Alcaraz Ivorra | 1 | 3 | | Q | G Fraile | 4 | 1 | | | | | | | | | | |
| | I Navarro | 3 | 4 | | 8 | R Bautista-Agut | 6 | 6 | | | | | | | | | | |
| 8 | R Bautista-Agut | 6 | 6 | | | | | | | | | | | | 1 | A Ramos | 6 | 6 |
| 3 | D Gimeno-Traver | 4 | 6 | 6 | | | | | | | | | | | 3 | D Gimeno-Traver | 4 | 4 |
| | C Niland | 6 | 4 | 4 | 3 | D Gimeno-Traver | 4 | 7 | 7 | | | | | | | | | |
| | L Sorensen | 6 | 6 | | | L Sorensen | 6 | 5 | 5 | | | | | | | | | |
| WC | G Mina | 3 | 4 | | | | | | | 3 | D Gimeno-Traver | 6 | 6 | | | | | |
| | J Sousa | 6 | 7$^7$ | | | | | | | | J Sousa | 0 | 3 | | | | | |
| WC | Juan Lizariturry | 3 | 6$^2$ | | | J Sousa | 6 | 7$^7$ | | | | | | | | | | |
| | J Aguilar | 6 | 3 | | | J Aguilar | 4 | 6$^1$ | | | | | | | | | | |
| 7 | G Olaso | 1 | 0$^r$ | | | | | | | | | | | | | | | |

### 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 | A Gensse | 6 | 7 | | | | | | | | | | | | | | |
| | A Begemann | 2 | 5 | | 6 | A Gensse | 2 | 1 | r | | | | | | | | |
| | E Korolev | 7$^7$ | 6$^6$ | 1 | Q | P Sousa | 6 | 2 | | | | | | | | | |
| Q | P Sousa | 6$^4$ | 7$^8$ | 6 | | | | | | Q | P Sousa | 2 | 5 | | | | |
| | S Vagnozzi | 6 | 6 | | | | | | | | S Vagnozzi | 6 | 7 | | | | |
| | Laurent Rochette | 1 | 1 | | | S Vagnozzi | 6 | 4 | 7$^7$ | | | | | | | | |
| | P Carreño-Busta | 6 | 6 | | | P Carreño-Busta | 3 | 6 | 6$^2$ | | | | | | | | |
| 4 | T de Bakker | 3 | 2 | | | | | | | | | | | | S Vagnozzi | 0 | 2 |
| 5 | B Paire | 2 | 2 | | | | | | | | | | | 2 | P Riba | 6 | 6 |
| | M Middelkoop | 6 | 6 | | | M Middelkoop | 6 | 6$^5$ | 7 | | | | | | | | |
| | M Alund | 0 | 1 | | WC | I Cervantes-Huegun | 4 | 7$^7$ | 5 | | | | | | | | |
| WC | I Cervantes-Huegun | 6 | 6 | | | | | | | | M Middelkoop | 3 | 3 | | | | |
| | G Granollers | 1 | 1$^r$ | | | | | | | 2 | P Riba | 6 | 6 | | | | |
| Q | MÁ López Jaén | 6 | 3 | | Q | MÁ López Jaén | 1 | 3 | | | | | | | | | |
| Q | Carlos Gómez-Herrera | 0 | 4 | | 2 | P Riba | 6 | 6 | | | | | | | | | |
| 2 | P Riba | 6 | 6 | | | | | | | | | | | | | | |