# 2017 Sparkassen ATP Challenger – Singles

Stefano Napolitano was the defending champion but lost in the second round to Matteo Donati.
Lorenzo Sonego won the title after defeating Tim Pütz 6–4, 6–4 in the final.

## Seeds

* Marius Copil (withdrew)
* Norbert Gombos (first round)
* Andreas Seppi (quarterfinals)
* Pierre-Hugues Herbert (semifinals)
* Márton Fucsovics (first round)
* Dustin Brown (second round)
* Oscar Otte (quarterfinals)
* Sebastian Ofner (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

### Finals

| Semifinals | Semifinals | Semifinals | Semifinals | Semifinals | Final | Final | Final | Final |
| Q | Tim Pütz | 6$^2$ | 6 | 7$^7$ | | | | |
| 4 | Pierre-Hugues Herbert | 7$^7$ | 1 | 6$^5$ | | | | |
| 4 | Pierre-Hugues Herbert | 7$^7$ | 1 | 6$^5$ | Q | Tim Pütz | 4 | 4 |
| | | | | | WC | Lorenzo Sonego | 6 | 6 |
| WC | Matteo Donati | 6$^6$ | 6$^1$ | | WC | Lorenzo Sonego | 6 | 6 |
| WC | Lorenzo Sonego | 7$^8$ | 7$^7$ | | | | | |

### 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 |
| LL | A Arnaboldi | 7$^7$ | 6 | | | | | | | | | | | | | | | | |
| WC | Patrick Prader | 6$^5$ | 2 | | LL | A Arnaboldi | 4 | 3 | | | | | | | | | | | |
| | V Galović | 6 | 3 | 6 | | V Galović | 6 | 6 | | | | | | | | | | | |
| | Jeremy Jahn | 3 | 6 | 3 | | | | | | | V Galović | 4 | 7$^7$ | 2 | | | | | |
| Q | T Pütz | 6 | 6 | | | | | | | Q | T Pütz | 6 | 6$^1$ | 6 | | | | | |
| Q | K Krawietz | 1 | 1 | | Q | T Pütz | 6 | 6$^3$ | 6 | | | | | | | | | | |
| | M Bourgue | 6 | 1 | 3 | 8 | S Ofner | 3 | 7$^7$ | 2 | | | | | | | | | | |
| 8 | S Ofner | 1 | 6 | 6 | | | | | | | | | | | Q | T Pütz | 6$^2$ | 6 | 7$^7$ |
| 4 | P-H Herbert | 6 | 6 | | | | | | | | | | | | 4 | P-H Herbert | 7$^7$ | 1 | 6$^5$ |
| | L Grigelis | 3 | 4 | | 4 | P-H Herbert | 7$^7$ | 6 | | | | | | | | | | | |
| | K de Schepper | 7$^7$ | 6 | | | K de Schepper | 6$^5$ | 4 | | | | | | | | | | | |
| | R Berankis | 6$^3$ | 4 | | | | | | | 4 | P-H Herbert | 7$^7$ | 3 | 6 | | | | | |
| PR | I Sijsling | 1 | 4 | | | | | | | Q | M Sieber | 6$^3$ | 6 | 3 | | | | | |
| Q | Marc Sieber | 6 | 6 | | Q | M Sieber | 2 | 7$^7$ | 7$^7$ | | | | | | | | | | |
| LL | E Leshem | 3 | 5 | | 6 | D Brown | 6 | 6$^3$ | 6$^5$ | | | | | | | | | | |
| 6 | D Brown | 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 |
| 5 | M Fucsovics | 6 | 4 | 4 | | | | | | | | | | | | | |
| | S Napolitano | 4 | 6 | 6 | | S Napolitano | 6 | 4 | 5 | | | | | | | | |
| | N Kuhn | 7$^7$ | 6$^3$ | 4 | WC | M Donati | 4 | 6 | 7 | | | | | | | | |
| WC | M Donati | 6$^4$ | 7$^7$ | 6 | | | | | | WC | M Donati | 7$^7$ | 7$^7$ | | | | |
| | S Caruso | 6 | 7$^7$ | | | | | | | 3 | A Seppi | 6$^5$ | 6$^5$ | | | | |
| | P Martínez | 3 | 6$^1$ | | | S Caruso | 7$^8$ | 4 | 4 | | | | | | | | |
| | J Janowicz | 2 | 2 | | 3 | A Seppi | 6$^6$ | 6 | 6 | | | | | | | | |
| 3 | A Seppi | 6 | 6 | | | | | | | | | | | WC | M Donati | 6$^6$ | 6$^1$ |
| 7 | O Otte | 6 | 4 | 7$^7$ | | | | | | | | | | WC | L Sonego | 7$^8$ | 7$^7$ |
| WC | F Gaio | 4 | 6 | 6$^2$ | 7 | O Otte | 6$^2$ | 6 | 6 | | | | | | | | |
| | B Zapata Miralles | 6 | 6 | | | B Zapata Miralles | 7$^7$ | 1 | 4 | | | | | | | | |
| | S Robert | 3 | 0 | | | | | | | 7 | O Otte | 1 | 4 | | | | |
| Q | M Viola | 7$^7$ | 5 | 7 | | | | | | WC | L Sonego | 6 | 6 | | | | |
| | T Lamasine | 6$^4$ | 7 | 5 | Q | M Viola | 4 | 1 | | | | | | | | | |
| WC | L Sonego | 2 | 7 | 6 | WC | L Sonego | 6 | 6 | | | | | | | | | |
| 2 | N Gombos | 6 | 5 | 4 | | | | | | | | | | | | | |