# 2013 Intersport Heilbronn Open – Singles

Björn Phau was the defending champion but he retired in the first round. Michael Berrer defeated Jan-Lennard Struff 7–5, 6–3 in the final to win the title.

## Seeds

* Paul-Henri Mathieu (semifinals, retired)
* Benjamin Becker (quarterfinals)
* Gilles Müller (first round)
* Björn Phau (first round, retired due to a knee injury)
* Adrian Ungur (second round)
* Ivo Karlović (first round, retired due to a back injury)
* Jan Hájek (second round)
* Ruben Bemelmans (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/WC | Paul-Henri Mathieu | 2 | 0$^r$ | | | | |
| | Michael Berrer | 6 | 1 | | | | |
| | Michael Berrer | 6 | 1 | | Michael Berrer | 7 | 6 |
| | | | | WC | Jan-Lennard Struff | 5 | 3 |
| | Olivier Rochus | 5 | 0 | WC | Jan-Lennard Struff | 5 | 3 |
| WC | Jan-Lennard Struff | 7 | 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/WC | P-H Mathieu | 6 | 6 | | | | | | | | | | | | | | | |
| | D Lajović | 3 | 4 | | 1/WC | P-H Mathieu | 6 | 2 | 7$^7$ | | | | | | | | | |
| | M Bachinger | 1 | 2 | | | E Gulbis | 2 | 6 | 6$^5$ | | | | | | | | | |
| | E Gulbis | 6 | 6 | | | | | | | 1/WC | P-H Mathieu | 6 | 6$^8$ | 7$^8$ | | | | |
| | J Ouanna | 3$^r$ | | | | | | | | | F Dancevic | 1 | 7$^{10}$ | 6$^6$ | | | | |
| Q | P Červenák | 4 | | | Q | P Červenák | 6$^3$ | 7$^7$ | 3 | | | | | | | | | |
| | F Dancevic | 6$^4$ | 7 | | | F Dancevic | 7$^7$ | 6$^3$ | 6 | | | | | | | | | |
| 6 | I Karlović | 7$^7$ | 5 | r | | | | | | | | | | | 1/WC | P-H Mathieu | 2 | 0$^r$ |
| 4 | B Phau | 3 | 0$^r$ | | | | | | | | | | | | | M Berrer | 6 | 1 |
| | I Marchenko | 6 | 3 | | | I Marchenko | 1 | 1 | | | | | | | | | | |
| Q | M Teixeira | 6$^7$ | 1 | | | M Berrer | 6 | 6 | | | | | | | | | | |
| | M Berrer | 7$^9$ | 6 | | | | | | | | M Berrer | 6 | 7$^9$ | | | | | |
| | U Ignatik | 6 | 6 | | | | | | | 8 | R Bemelmans | 4 | 6$^7$ | | | | | |
| Q | D Meffert | 4 | 3 | | | U Ignatik | 6$^5$ | 2 | | | | | | | | | | |
| | M Authom | 7$^7$ | 1 | 1 | 8 | R Bemelmans | 7$^7$ | 6 | | | | | | | | | | |
| 8 | R Bemelmans | 6$^3$ | 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 |
| 7 | J Hájek | 7 | 6 | | | | | | | | | | | | | | | |
| Q | B Knittel | 6$^3$ | 4 | | 7 | J Hájek | 4 | 5 | | | | | | | | | | |
| | M Copil | 6 | 6 | | | M Copil | 6 | 7 | | | | | | | | | | |
| WC | A Beck | 3 | 2 | | | | | | | | M Copil | 4 | 2 | | | | | |
| | M Viola | 3 | 5 | | | | | | | | O Rochus | 6 | 6 | | | | | |
| | O Rochus | 6 | 7 | | | O Rochus | 6 | 6 | | | | | | | | | | |
| | P Petzschner | 6 | 1 | 6 | | P Petzschner | 4 | 3 | | | | | | | | | | |
| 3 | G Müller | 1 | 6 | 4 | | | | | | | | | | | | O Rochus | 5 | 0 |
| 5 | A Ungur | 7$^7$ | 3 | | | | | | | | | | | | WC | J-L Struff | 7 | 6 |
| WC | C-M Stebe | 6$^4$ | 0$^r$ | | 5 | A Ungur | 6 | 3 | 3 | | | | | | | | | |
| WC | J-L Struff | 6 | 6 | | WC | J-L Struff | 3 | 6 | 6 | | | | | | | | | |
| | K de Schepper | 3 | 2 | | | | | | | WC | J-L Struff | 6 | 4 | 7$^7$ | | | | |
| | K Beck | 2 | 3 | | | | | | | 2 | B Becker | 1 | 6 | 6$^2$ | | | | |
| | F Serra | 6 | 6 | | | F Serra | 5 | 2 | | | | | | | | | | |
| | I Sergeyev | 3 | 2 | | 2 | B Becker | 7 | 6 | | | | | | | | | | |
| 2 | B Becker | 6 | 6 | | | | | | | | | | | | | | | |