# 2012 Intersport Heilbronn Open – Singles

Björn Phau won the title, defeating Ruben Bemelmans in the final 6–7$^{(4–7)}$, 6–3, 6–4.
Defending champion Bastian Knittel lost in the second round to Ruben Bemelmans.

## Seeds

* Gilles Müller (first round)
* Cedrik-Marcel Stebe (semifinals)
* Matthias Bachinger (second round)
* Michael Russell (second round)
* Karol Beck (second round)
* Michael Berrer (quarterfinals)
* Grega Žemlja (first round)
* Daniel Brands (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 | Semifinals | Final | Final | Final | Final | Final |
| | Björn Phau | 3 | 6 | 7$^7$ | | | | | |
| Q | Dominik Meffert | 6 | 3 | 6$^3$ | | | | | |
| Q | Dominik Meffert | 6 | 3 | 6$^3$ | | Björn Phau | 6$^4$ | 6 | 6 |
| | | | | | Q | Ruben Bemelmans | 7$^7$ | 3 | 4 |
| Q | Ruben Bemelmans | 7 | 6 | | Q | Ruben Bemelmans | 7$^7$ | 3 | 4 |
| 2 | Cedrik-Marcel Stebe | 5 | 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 | Semifinals | Semifinals | Semifinals | Semifinals | Semifinals |
| 1/WC | G Müller | 6$^6$ | 3 | | | | | | | | | | | | | | | |
| | M Kližan | 7$^8$ | 6 | | | M Kližan | 6 | 7$^{10}$ | | | | | | | | | | |
| | I van der Merwe | 2 | 2 | | Q | M Zverev | 3 | 6$^8$ | | | | | | | | | | |
| Q | M Zverev | 6 | 6 | | | | | | | | M Kližan | 0 | 3 | | | | | |
| | M İlhan | 6$^6$ | 6 | 6 | | | | | | | B Phau | 6 | 6 | | | | | |
| | J Hájek | 7$^8$ | 2 | 2 | | M İlhan | 6 | 3 | 2 | | | | | | | | | |
| | B Phau | 6 | 6 | | | B Phau | 3 | 6 | 6 | | | | | | | | | |
| 7 | G Žemlja | 3 | 4 | | | | | | | | | | | | B Phau | 3 | 6 | 7$^7$ |
| 4 | M Russell | 6 | 7 | | | | | | | | | | | Q | D Meffert | 6 | 3 | 6$^3$ |
| Q | M Gawron | 2 | 5 | | 4 | M Russell | 2 | 6 | 4 | | | | | | | | | |
| | A Golubev | 4 | 5 | | Q | D Meffert | 6 | 2 | 6 | | | | | | | | | |
| Q | D Meffert | 6 | 7 | | | | | | | Q | D Meffert | 6 | 6 | | | | | |
| | D Muñoz-de la Nava | 3 | 3 | | | | | | | | R de Voest | 3 | 4 | | | | | |
| | R de Voest | 6 | 6 | | | R de Voest | 6 | 6 | | | | | | | | | | |
| | P Carreño-Busta | 3 | 4 | | 5 | K Beck | 4 | 0 | | | | | | | | | | |
| 5 | K Beck | 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 | Semifinals | Semifinals | Semifinals | Semifinals |
| 8 | D Brands | 5 | 1 | | | | | | | | | | | | | | |
| WC | B Knittel | 7 | 6 | | WC | B Knittel | 6$^1$ | 1 | | | | | | | | | |
| | E Donskoy | 2 | 2 | | Q | R Bemelmans | 7$^7$ | 6 | | | | | | | | | |
| Q | R Bemelmans | 6 | 6 | | | | | | | Q | R Bemelmans | 7$^7$ | 6 | | | | |
| | A Haider-Maurer | 5 | 6$^2$ | | | | | | | | V Pospisil | 6$^1$ | 3 | | | | |
| | V Pospisil | 7 | 7$^7$ | | | V Pospisil | 6 | 4 | 7$^8$ | | | | | | | | |
| | S Bubka | 4 | 6 | 4 | 3 | M Bachinger | 4 | 6 | 6$^6$ | | | | | | | | |
| 3 | M Bachinger | 6 | 4 | 6 | | | | | | | | | | Q | R Bemelmans | 7 | 6 |
| 6 | M Berrer | 6 | 3 | 6 | | | | | | | | | | 2 | C-M Stebe | 5 | 3 |
| | T Gabashvili | 2 | 6 | 1 | 6 | M Berrer | 6 | 6 | | | | | | | | | |
| | F Dancevic | 6 | 6 | | | F Dancevic | 4 | 4 | | | | | | | | | |
| WC | K Krawietz | 3 | 3 | | | | | | | 6 | M Berrer | 1 | 4 | | | | |
| | A Gensse | 4 | 5 | | | | | | | 2 | C-M Stebe | 6 | 6 | | | | |
| WC | B Becker | 6 | 7 | | WC | B Becker | 6 | 6$^5$ | 5$^r$ | | | | | | | | |
| | S Greul | 4 | 4 | | 2 | C-M Stebe | 3 | 7$^7$ | 6 | | | | | | | | |
| 2 | C-M Stebe | 6 | 6 | | | | | | | | | | | | | | |