# 2017 Città di Caltanissetta – Singles

Paolo Lorenzi was the defending champion and successfully defended his title, defeating Alessandro Giannessi 6–4, 6–2 in the final.

## Seeds

* Paolo Lorenzi (champion)
* Dušan Lajović (first round)
* Mikhail Kukushkin (quarterfinals)
* Radu Albot (semifinals)
* Facundo Bagnis (second round)
* Marco Cecchinato (quarterfinals)
* Alessandro Giannessi (final)
* Tennys Sandgren (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 | Paolo Lorenzi | 6 | 6 | | | | |
| 4 | Radu Albot | 4 | 4 | | | | |
| 4 | Radu Albot | 4 | 4 | 1/WC | Paolo Lorenzi | 6 | 6 |
| | | | | 7 | Alessandro Giannessi | 4 | 2 |
| 7 | Alessandro Giannessi | 6 | 7$^7$ | 7 | Alessandro Giannessi | 4 | 2 |
| Q | Cedrik-Marcel Stebe | 3 | 6$^5$ | | | | |

### 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 Lorenzi | 7 | 6 | | | | | | | | | | | | | | | |
| | M Arévalo | 5 | 4 | | 1/WC | P Lorenzi | 6$^6$ | 6 | 6 | | | | | | | | | |
| | A Arnaboldi | 4 | 3 | | | L Đere | 7$^8$ | 3 | 2 | | | | | | | | | |
| | L Đere | 6 | 6 | | | | | | | 1/WC | P Lorenzi | 6 | 3 | 6 | | | | |
| | G Andreozzi | 6 | 6 | | | | | | | | G Andreozzi | 2 | 6 | 4 | | | | |
| | A Vatutin | 1 | 4 | | | G Andreozzi | 7 | 7$^7$ | | | | | | | | | | |
| | J Kovalík | 4 | 4 | | 5 | F Bagnis | 5 | 6$^5$ | | | | | | | | | | |
| 5 | F Bagnis | 6 | 6 | | | | | | | | | | | | 1/WC | P Lorenzi | 6 | 6 |
| 4 | R Albot | 6 | 7 | | | | | | | | | | | | 4 | R Albot | 4 | 4 |
| | J McGee | 2 | 5 | | 4 | R Albot | 2 | 6 | 6 | | | | | | | | | |
| | R Bellotti | 6 | 6 | | | R Bellotti | 6 | 4 | 4 | | | | | | | | | |
| | F Gaio | 3 | 0 | | | | | | | 4 | R Albot | 6 | 3 | 7$^7$ | | | | |
| WC | S Bolelli | 7 | 6 | | | | | | | 8 | T Sandgren | 3 | 6 | 6$^4$ | | | | |
| Q | JP Sorgi | 5 | 2 | | WC | S Bolelli | 6 | 4 | 4 | | | | | | | | | |
| | V Šafránek | 2 | 6 | 2 | 8 | T Sandgren | 3 | 6 | 6 | | | | | | | | | |
| 8 | T Sandgren | 6 | 4 | 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 | A Giannessi | 7 | 7 | | | | | | | | | | | | | | | |
| | E López Pérez | 5 | 5 | | 7 | A Giannessi | 6 | 6 | | | | | | | | | | |
| | Í Cervantes | 3 | 6 | 7 | | Í Cervantes | 2 | 3 | | | | | | | | | | |
| Q | M Berrettini | 6 | 2 | 5 | | | | | | 7 | A Giannessi | 6 | 1 | 6 | | | | |
| | R Ramanathan | 6 | 4 | 7$^8$ | | | | | | 3 | M Kukushkin | 4 | 6 | 1 | | | | |
| Q | S Ofner | 2 | 6 | 6$^6$ | | R Ramanathan | 0 | 2 | | | | | | | | | | |
| WC | G Mager | 4 | 0 | | 3 | M Kukushkin | 6 | 6 | | | | | | | | | | |
| 3 | M Kukushkin | 6 | 6 | | | | | | | | | | | | 7 | A Giannessi | 6 | 7$^7$ |
| 6 | M Cecchinato | 4 | 7 | 6 | | | | | | | | | | | Q | C-M Stebe | 3 | 6$^5$ |
| | J Samper Montaña | 6 | 5 | 1 | 6 | M Cecchinato | 7 | 3 | 6 | | | | | | | | | |
| | A Rublev | 6 | 6 | | | A Rublev | 5 | 6 | 3 | | | | | | | | | |
| | M Zekić | 3 | 4 | | | | | | | 6 | M Cecchinato | 1 | 2 | | | | | |
| | S Caruso | 5 | 2 | | | | | | | Q | C-M Stebe | 6 | 6 | | | | | |
| | S Travaglia | 7 | 6 | | | S Travaglia | 7$^7$ | 6$^6$ | 3 | | | | | | | | | |
| Q | C-M Stebe | 6 | 6 | | Q | C-M Stebe | 6$^3$ | 7$^8$ | 6 | | | | | | | | | |
| 2/WC | D Lajović | 2 | 2 | | | | | | | | | | | | | | | |