# 2015 Guzzini Challenger – Singles

Gilles Müller was the defending champion, but he did not participate in 2015.
Mirza Bašić won the title defeating Ričardas Berankis in the final, 6–4, 3–6, 7–6$^{(7–4)}$.

## Seeds

* Ričardas Berankis (final)
* Ruben Bemelmans (quarterfinals)
* Michał Przysiężny (semifinals)
* Alexander Kudryavtsev (first round)
* Peter Gojowczyk (second round)
* Hiroki Moriya (first round)
* Niels Desein (first round, retired)
* Márton Fucsovics (semifinals)

## 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 |
| 1 | Ričardas Berankis | 6 | 6 | | | | | | |
| 8 | Márton Fucsovics | 4 | 3 | | | | | | |
| 8 | Márton Fucsovics | 4 | 3 | | 1 | Ričardas Berankis | 4 | 6 | 6$^4$ |
| | | | | | | Mirza Bašić | 6 | 3 | 7$^7$ |
| 3 | Michał Przysiężny | 4 | 6 | 1 | | Mirza Bašić | 6 | 3 | 7$^7$ |
| | Mirza Bašić | 6 | 3 | 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 | Semifinals | Semifinals | Semifinals | Semifinals |
| 1 | R Berankis | 5 | 6 | 6 | | | | | | | | | | | | | |
| Q | Sébastien Boltz | 7 | 2 | 2 | 1 | R Berankis | 6 | 6 | | | | | | | | | |
| WC | S Napolitano | 0 | 4 | | | D Guez | 4 | 3 | | | | | | | | | |
| | D Guez | 6 | 6 | | | | | | | 1 | R Berankis | 6 | 6 | | | | |
| | M Safwat | 1 | 6 | 6$^7$ | | | | | | SE | S Caruso | 1 | 3 | | | | |
| Q | I Bozoljac | 6 | 3 | 7$^9$ | Q | I Bozoljac | 3 | 2 | | | | | | | | | |
| SE | S Caruso | 2 | 6 | 2 | SE | S Caruso | 6 | 6 | | | | | | | | | |
| 7 | N Desein | 6 | 0 | 0$^r$ | | | | | | | | | | 1 | R Berankis | 6 | 6 |
| 4 | A Kudryavtsev | 3 | 5 | | | | | | | | | | | 8 | M Fucsovics | 4 | 3 |
| | A Lazov | 6 | 7 | | | A Lazov | 0 | 3 | | | | | | | | | |
| | D Wu | 6 | 5 | 3 | | Y Mertens | 6 | 6 | | | | | | | | | |
| | Y Mertens | 2 | 7 | 6 | | | | | | | Y Mertens | 4 | 4 | | | | |
| WC | M Berrettini | 4 | 3 | | | | | | | 8 | M Fucsovics | 6 | 6 | | | | |
| Q | F Cipolla | 6 | 6 | | Q | F Cipolla | 6 | 4 | 5 | | | | | | | | |
| | Connor Smith | 2 | 2 | | 8 | M Fucsovics | 2 | 6 | 7 | | | | | | | | |
| 8 | M Fucsovics | 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 |
| 6 | H Moriya | 5 | 6 | 6$^7$ | | | | | | | | | | | | | | | |
| | J Milton | 7 | 2 | 7$^9$ | | J Milton | 3 | 6 | 6 | | | | | | | | | | |
| WC | Edoardo Eremin | 6 | 6 | | WC | E Eremin | 6 | 1 | 3 | | | | | | | | | | |
| Q | J Witten | 3 | 1 | | | | | | | | J Milton | 3 | 6$^3$ | | | | | | |
| | R Boutillier | 6$^0$ | 3 | | | | | | | 3 | M Przysiężny | 6 | 7$^7$ | | | | | | |
| | Henrique Cunha | 7$^7$ | 6 | | | H Cunha | 1 | 4 | | | | | | | | | | | |
| LL | C Wang | 0 | 7 | 3 | 3 | M Przysiężny | 6 | 6 | | | | | | | | | | | |
| 3 | M Przysiężny | 6 | 5 | 6 | | | | | | | | | | | 3 | M Przysiężny | 4 | 6 | 1 |
| 5 | P Gojowczyk | 7 | 6 | | | | | | | | | | | | | M Bašić | 6 | 3 | 6 |
| Alt | Q Halys | 5 | 2 | | 5 | P Gojowczyk | 6$^6$ | 3 | | | | | | | | | | | |
| | M Bašić | 6 | 6 | | | M Bašić | 7$^8$ | 6 | | | | | | | | | | | |
| | M Zekić | 4 | 2 | | | | | | | | M Bašić | 4 | 6 | 6 | | | | | |
| | D Zhyrmont | 6 | 6 | | | | | | | 2 | R Bemelmans | 6 | 3 | 2 | | | | | |
| WC | Giacomo Miccini | 2 | 2 | | | D Zhyrmont | 2 | 4 | | | | | | | | | | | |
| | D Pérez Sanz | 2 | 2 | | 2 | R Bemelmans | 6 | 6 | | | | | | | | | | | |
| 2 | R Bemelmans | 6 | 6 | | | | | | | | | | | | | | | | |