# 2017 Croatia Open Umag – Singles

Fabio Fognini was the defending champion, but lost in the quarterfinals to lucky loser Andrey Rublev.
Rublev went on to win his first ATP World Tour title, defeating Paolo Lorenzi in the final, 6–4, 6–2. He was the seventh lucky loser in ATP history to win a tour-level title and the first to do so since Rajeev Ram at 2009 Newport.

## Seeds

The top four seeds receive a bye into the second round.
* David Goffin (quarterfinals)
* Gaël Monfils (second round)
* Fabio Fognini (quarterfinals)
* Paolo Lorenzi (final)
* Gilles Simon (first round)
* Borna Ćorić (withdrew)
* Benoît Paire (first round)
* Jiří Veselý (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 | Semifinals | Final | Final | Final | Final |
| WC | Ivan Dodig | 6$^4$ | 1 | | | | | |
| LL | Andrey Rublev | 7$^7$ | 6 | | | | | |
| LL | Andrey Rublev | 7$^7$ | 6 | | LL | Andrey Rublev | 6 | 6 |
| | | | | | 4 | Paolo Lorenzi | 4 | 2 |
| 4 | Paolo Lorenzi | 6 | 4 | 6 | 4 | Paolo Lorenzi | 4 | 2 |
| | Alessandro Giannessi | 2 | 6 | 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 | Quarterfinals | Semifinals | Semifinals | Semifinals | Semifinals |
| | | | | | 1/WC | D Goffin | 6 | 6$^7$ | 6 | | | | | | | | | |
| Q | A Balázs | 6 | 0 | 7 | Q | A Balázs | 4 | 7$^9$ | 2 | | | | | | | | | |
| | D Džumhur | 3 | 6 | 5 | | | | | | 1/WC | D Goffin | 5 | 3 | | | | | |
| | M Copil | 4 | 6$^4$ | | | | | | | WC | I Dodig | 7 | 6 | | | | | |
| WC | I Dodig | 6 | 7$^7$ | | WC | I Dodig | 3 | 7$^8$ | 6 | | | | | | | | | |
| | M Cecchinato | 6 | 3 | 6 | | M Cecchinato | 6 | 6$^6$ | 2 | | | | | | | | | |
| 5 | G Simon | 1 | 6 | 1 | | | | | | | | | | | WC | I Dodig | 6$^4$ | 1 |
| | | | | | | | | | | | | | | | LL | A Rublev | 7$^7$ | 6 |
| | | | | | 3 | F Fognini | 6 | 1 | 6 | | | | | | | | | |
| | M Youzhny | 3 | 5 | | | N Kicker | 4 | 6 | 2 | | | | | | | | | |
| | N Kicker | 6 | 7 | | | | | | | 3 | F Fognini | 7$^7$ | 2 | 6$^2$ | | | | |
| | A Martin | 6 | 6 | | | | | | | LL | A Rublev | 6$^5$ | 6 | 7$^7$ | | | | |
| | D Istomin | 3 | 2 | | | A Martin | 6$^5$ | 5 | | | | | | | | | | |
| | C Berlocq | 2 | 4 | | LL | A Rublev | 7$^7$ | 7 | | | | | | | | | | |
| LL | A Rublev | 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 |
| 8 | J Veselý | 6 | 6 | | | | | | | | | | | | | | | | |
| | N Gombos | 4 | 0 | | 8 | J Veselý | 7$^7$ | 6 | | | | | | | | | | | |
| | R Albot | 6 | 6 | | | R Albot | 6$^3$ | 2 | | | | | | | | | | | |
| Q | M Zekić | 4 | 0 | | | | | | | 8 | J Veselý | 6 | 5 | 3 | | | | | |
| | J Sousa | 3 | 6 | 4 | | | | | | 4 | P Lorenzi | 1 | 7 | 6 | | | | | |
| | A Bedene | 6 | 4 | 6 | | A Bedene | 5 | 3 | | | | | | | | | | | |
| | | | | | 4 | P Lorenzi | 7 | 6 | | | | | | | | | | | |
| | | | | | | | | | | | | | | | 4 | P Lorenzi | 6 | 4 | 6 |
| 7 | B Paire | 2 | 6 | 3 | | | | | | | | | | | | A Giannessi | 2 | 6 | 3 |
| Q | K de Schepper | 6 | 4 | 6 | Q | K de Schepper | 2 | 6 | 3 | | | | | | | | | | |
| WC | M Polmans | 7$^7$ | 3 | 4 | | A Giannessi | 6 | 3 | 6 | | | | | | | | | | |
| | A Giannessi | 6$^3$ | 6 | 6 | | | | | | | A Giannessi | 6$^3$ | 6 | 7 | | | | | |
| | R Dutra Silva | 6 | 6 | | | | | | | | R Dutra Silva | 7$^7$ | 2 | 5 | | | | | |
| Q | M Trungelliti | 1 | 2 | | | R Dutra Silva | 7$^7$ | 4 | 6 | | | | | | | | | | |
| | | | | | 2 | G Monfils | 6$^5$ | 6 | 3 | | | | | | | | | | |

## Qualifying
### Seeds

* Andrey Rublev (qualifying competition, Lucky loser)
* Kenny de Schepper (qualified)
* Marco Trungelliti (qualified)
* Stefano Napolitano (qualifying competition)
* Attila Balázs (qualified)
* Miljan Zekić (qualified)
* Franko Škugor (qualifying competition)
* Matteo Donati (qualifying competition)

### Qualifiers

* Attila Balázs
* Kenny de Schepper
* Marco Trungelliti
* Miljan Zekić

### Lucky losers

* Andrey Rublev

### Qualifying draw
#### First qualifier

| First round | First round | First round | First round | First round | Qualifying competition | Qualifying competition | Qualifying competition | Qualifying competition |
| 1 | Andrey Rublev | 6 | 6 | | | | | |
| | Jordi Samper Montaña | 2 | 4 | | | | | |
| | Jordi Samper Montaña | 2 | 4 | | 1 | Andrey Rublev | 3 | 5 |
| | | | | | 5 | Attila Balázs | 6 | 7 |
| PR | Matija Pecotić | 6 | 6$^4$ | 2 | 5 | Attila Balázs | 6 | 7 |
| 5 | Attila Balázs | 3 | 7$^7$ | 6 | | | | |

#### Second qualifier

| First round | First round | First round | First round | First round | Qualifying competition | Qualifying competition | Qualifying competition | Qualifying competition | Qualifying competition |
| 2 | Kenny de Schepper | 6 | 7 | | | | | | |
| | Matteo Viola | 2 | 5 | | | | | | |
| | Matteo Viola | 2 | 5 | | 2 | Kenny de Schepper | 1 | 7$^7$ | 7$^9$ |
| | | | | | 7 | Franko Škugor | 6 | 6$^2$ | 6$^7$ |
| | Nils Langer | 7$^8$ | 2 | 3 | 7 | Franko Škugor | 6 | 6$^2$ | 6$^7$ |
| 7 | Franko Škugor | 6$^6$ | 6 | 6 | | | | | |

#### Third qualifier

| First round | First round | First round | First round | First round | Qualifying competition | Qualifying competition | Qualifying competition | Qualifying competition |
| 3 | Marco Trungelliti | 6 | 6 | | | | | |
| WC | Rocco Savin | 1 | 1 | | | | | |
| WC | Rocco Savin | 1 | 1 | | 3 | Marco Trungelliti | 6 | 6 |
| | | | | | 8 | Matteo Donati | 2 | 4 |
| | Walter Trusendi | 6 | 4 | 3 | 8 | Matteo Donati | 2 | 4 |
| 8 | Matteo Donati | 4 | 6 | 6 | | | | |

#### Fourth qualifier

| First round | First round | First round | First round | First round | Qualifying competition | Qualifying competition | Qualifying competition | Qualifying competition |
| 4 | Stefano Napolitano | 6 | 7 | | | | | |
| | Tomislav Brkić | 3 | 5 | | | | | |
| | Tomislav Brkić | 3 | 5 | | 4 | Stefano Napolitano | 3 | 5 |
| | | | | | 6 | Miljan Zekić | 6 | 7 |
| WC | Nino Serdarušić | 6 | 3 | 4 | 6 | Miljan Zekić | 6 | 7 |
| 6 | Miljan Zekić | 3 | 6 | 6 | | | | |