# 2011 Košice Open – Singles

Rubén Ramírez Hidalgo was the defending champion; however, he lost to Evgeny Donskoy in the second round.
Simon Greul won the final against Victor Crivoi 6–2, 6–1.

## Seeds

* Rubén Ramírez Hidalgo (second round)
* Rui Machado (first round)
* Lukáš Rosol (semifinals)
* Ivo Minář (first round, retired)
* Simon Greul (champion)
* Brian Dabul (first round)
* David Guez (quarterfinals)
* Yuri Schukin (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

### Finals

| Semifinals | Semifinals | Semifinals | Semifinals | Final | Final | Final | Final |
| | Evgeny Donskoy | 3 | 5 | | | | |
| 5 | Simon Greul | 6 | 7 | | | | |
| 5 | Simon Greul | 6 | 7 | 5 | Simon Greul | 6 | 6 |
| | | | | | Victor Crivoi | 2 | 1 |
| 3 | Lukáš Rosol | 4 | 3 | | Victor Crivoi | 2 | 1 |
| | Victor Crivoi | 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 | R Ramírez Hidalgo | 6 | 6 | | | | | | | | | | | | | | | |
| WC | Marko Daniš | 1 | 2 | | 1 | R Ramírez Hidalgo | 4 | 6 | 4 | | | | | | | | | |
| | J Silva | 6$^3$ | 1 | | | E Donskoy | 6 | 4 | 6 | | | | | | | | | |
| | E Donskoy | 7 | 6 | | | | | | | | E Donskoy | 6 | 3 | 6 | | | | |
| Q | Andrea Arnaboldi | 6 | 7 | | | | | | | Q | Andrea Arnaboldi | 2 | 6 | 2 | | | | |
| WC | M Mečíř Jr. | 2 | 6$^2$ | | Q | Andrea Arnaboldi | 7 | 6 | | | | | | | | | | |
| | M Viola | 1 | 6 | 6 | | M Viola | 5 | 4 | | | | | | | | | | |
| 6 | B Dabul | 6 | 4 | 3 | | | | | | | | | | | | E Donskoy | 3 | 5 |
| 4 | I Minář | 7 | 6$^9$ | 0$^r$ | | | | | | | | | | | 5 | S Greul | 6 | 7 |
| | F Bagnis | 6$^3$ | 7 | 4 | | F Bagnis | 2 | 2 | | | | | | | | | | |
| Q | W Odesnik | 6 | 6 | | Q | W Odesnik | 6 | 6 | | | | | | | | | | |
| | A Gensse | 1 | 0 | | | | | | | Q | W Odesnik | 7 | 5 | 5 | | | | |
| | M Teixeira | 2 | 6 | 0 | | | | | | 5 | S Greul | 6$^5$ | 7 | 7 | | | | |
| SE | J Sousa | 6 | 2 | 6 | SE | J Sousa | 5 | 2 | | | | | | | | | | |
| | E Schwank | 0 | 6$^4$ | | 5 | S Greul | 7 | 6 | | | | | | | | | | |
| 5 | S Greul | 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 | Semifinals | Semifinals | Semifinals | Semifinals |
| 7 | D Guez | 6 | 6 | | | | | | | | | | | | | | |
| | A Martin | 4 | 3 | | 7 | D Guez | 7 | 6 | | | | | | | | | |
| | D Muñoz de la Nava | 1 | 4 | | | A Molteni | 6$^5$ | 4 | | | | | | | | | |
| | A Molteni | 6 | 6 | | | | | | | 7 | D Guez | 4 | 3 | | | | |
| | B Knittel | 2 | 3 | | | | | | | 3 | L Rosol | 6 | 6 | | | | |
| | D Lojda | 6 | 6 | | | D Lojda | 6 | 3 | 6$^8$ | | | | | | | | |
| Q | L Kirche | 4 | 6 | 0 | 3 | L Rosol | 3 | 6 | 7 | | | | | | | | |
| 3 | L Rosol | 6 | 2 | 6 | | | | | | | | | | 3 | L Rosol | 4 | 3 |
| 8 | Y Schukin | 6$^1$ | 6 | 3 | | | | | | | | | | | V Crivoi | 6 | 6 |
| SE | Jan-Lennard Struff | 7 | 3 | 6 | SE | Jan-Lennard Struff | 3 | 3 | | | | | | | | | |
| WC | D Hrbatý | 6 | 6 | | WC | D Hrbatý | 6 | 6 | | | | | | | | | |
| Q | J Martí | 1 | 1 | | | | | | | WC | D Hrbatý | 6$^4$ | 5 | | | | |
| | G Olaso | 6 | 6 | | | | | | | | V Crivoi | 7 | 7 | | | | |
| WC | Martin Přikryl | 2 | 2 | | | G Olaso | 3 | 6$^4$ | | | | | | | | | |
| | V Crivoi | 6 | 6 | | | V Crivoi | 6 | 7 | | | | | | | | | |
| 2 | R Machado | 2 | 2 | | | | | | | | | | | | | | |