# 2009 Siemens Open – Singles

Jesse Huta Galung was the title defender, but he lost to Pablo Cuevas already in the first round. Kristof Vliegen became the new champion, after retired Albert Montañés in the final.

## Seeds

* Albert Montañés (final, retired)
* Máximo González (first round)
* Steve Darcis (semifinals)
* Julien Benneteau (second round)
* Kristof Vliegen (champion)
* Daniel Köllerer (quarterfinals)
* Daniel Gimeno-Traver (second round)
* Simon Greul (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

### Final four

| Semifinals | Semifinals | Semifinals | Semifinals | Semifinals | Final | Final | Final |
| 1 | Albert Montañés | 6 | 3 | 6 | | | |
| 3 | Steve Darcis | 4 | 6 | 1 | | | |
| 3 | Steve Darcis | 4 | 6 | 1 | 1 | Albert Montañés | 2$^r$ |
| | | | | | 5 | Kristof Vliegen | 4 |
| 5 | Kristof Vliegen | 6 | 3 | 6 | 5 | Kristof Vliegen | 4 |
| | Pablo Cuevas | 3 | 6 | 3 | | | |

### 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 | Semifinals |
| 1 | A Montañés | 7 | 6 | | | | | | | | | | | | | | | | |
| | D Muñoz-De La Nava | 5 | 4 | | 1 | A Montañés | 6 | 7 | | | | | | | | | | | |
| | J-P Amado | 3 | 6 | 1 | Q | G Kretschmer | 1 | 6$^3$ | | | | | | | | | | | |
| Q | G Kretschmer | 6 | 3 | 6 | | | | | | 1 | A Montañés | 5 | | | | | | | |
| | J Sirianni | 7 | 4 | 3 | | | | | | 6 | D Köllerer | 2$^r$ | | | | | | | |
| | T de Bakker | 6$^{10}$ | 6 | 6 | | T de Bakker | 6 | 1 | 1 | | | | | | | | | | |
| Q | F Prpic | 2 | 4 | | 6 | D Köllerer | 2 | 6 | 6 | | | | | | | | | | |
| 6 | D Köllerer | 6 | 6 | | | | | | | | | | | | 1 | A Montañés | 6 | 3 | |
| 3 | S Darcis | 6 | 6 | | | | | | | | | | | | 3 | S Darcis | 4 | 6 | 1 |
| | L Recouderc | 4 | 3 | | 3 | S Darcis | 4 | 7 | 7 | | | | | | | | | | |
| | Y Mertens | 6$^1$ | 3 | | | J Vaněk | 6 | 6$^3$ | 6$^2$ | | | | | | | | | | |
| | J Vaněk | 7 | 6 | | | | | | | 3 | S Darcis | 7 | 2 | 6 | | | | | |
| | JI Chela | 6 | 6 | | | | | | | | JI Chela | 5 | 6 | 2 | | | | | |
| Q | A Gensse | 3 | 2 | | | JI Chela | 6$^4$ | 6 | 7 | | | | | | | | | | |
| WC | T Schoorel | 4 | 4 | | 8 | S Greul | 7 | 3 | 5 | | | | | | | | | | |
| 8 | S Greul | 6 | 6 | | | | | | | | | | | | | | | | |

### 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 | Semifinals |
| 5 | K Vliegen | 6 | 6 | | | | | | | | | | | | | | | | |
| | P Luczak | 3 | 3 | | 5 | K Vliegen | 7 | 7 | | | | | | | | | | | |
| WC | S Fransen | 6 | 4 | | WC | S Fransen | 5 | 5 | | | | | | | | | | | |
| | P Riba | 1 | 1$^r$ | | | | | | | 5 | K Vliegen | 4 | 6 | 6 | | | | | |
| LL | A Vejmělka | 7 | 4 | 2 | | | | | | | T Tenconi | 6 | 4 | 2 | | | | | |
| | T Tenconi | 6$^5$ | 6 | 6 | | T Tenconi | 6 | 7 | | | | | | | | | | | |
| | J Reister | 3 | 6 | 2 | 4 | J Benneteau | 3 | 5 | | | | | | | | | | | |
| 4 | J Benneteau | 6 | 4 | 6 | | | | | | | | | | | 5 | K Vliegen | 6 | 3 | 6 |
| 7 | D Gimeno-Traver | 6 | 5 | 6 | | | | | | | | | | | | P Cuevas | 3 | 6 | 3 |
| | JP Brzezicki | 3 | 7 | 2 | 7 | D Gimeno-Traver | 6$^2$ | 6 | 4 | | | | | | | | | | |
| | J Huta Galung | 5 | 3 | | | P Cuevas | 7 | 4 | 6 | | | | | | | | | | |
| | P Cuevas | 7 | 6 | | | | | | | | P Cuevas | 6 | 6 | | | | | | |
| | L Rosol | 4 | 2 | | | | | | | WC | R Sluiter | 4 | 2 | | | | | | |
| Q | R Junaid | 6 | 6 | | Q | R Junaid | 1 | 5 | | | | | | | | | | | |
| WC | R Sluiter | 6 | 6 | | WC | R Sluiter | 6 | 7 | | | | | | | | | | | |
| 2 | M González | 3 | 4 | | | | | | | | | | | | | | | | |