# 2018 Istanbul Open – Singles

Marin Čilić was the defending champion, but lost in the second round to Malek Jaziri.
Taro Daniel won his first ATP World Tour title, defeating Jaziri in the final, 7–6$^{(7–4)}$, 6–4.

## Seeds

The top four seeds receive a bye into the second round.
* Marin Čilić (second round)
* Damir Džumhur (second round)
* Andreas Seppi (second round)
* Aljaž Bedene (second round)
* Paolo Lorenzi (quarterfinals)
* Viktor Troicki (second round)
* Jiří Veselý (quarterfinals)
* Nikoloz Basilashvili (first 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 | Final | Final | Final |
| Malek Jaziri | 6 | 6 | | | | |
| Laslo Đere | 3 | 2 | | | | |
| Laslo Đere | 3 | 2 | | Malek Jaziri | 6$^4$ | 4 |
| | | | | Taro Daniel | 7$^7$ | 6 |
| Taro Daniel | 6 | 4 | 6 | Taro Daniel | 7$^7$ | 6 |
| Jérémy Chardy | 3 | 6 | 4 | | | |

### 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 |
| | | | | | 1 | M Čilić | 4 | 2 | | | | | | | | | |
| | M Jaziri | 6 | 6 | | | M Jaziri | 6 | 6 | | | | | | | | | |
| WC | M İlhan | 1 | 2 | | | | | | | | M Jaziri | 3 | 6 | 6 | | | |
| Q | T Monteiro | 6 | 3 | 6 | | | | | | 7 | J Veselý | 6 | 4 | 1 | | | |
| | G Melzer | 2 | 6 | 1 | Q | T Monteiro | 2 | 6 | 6$^3$ | | | | | | | | |
| Q | D Gimeno Traver | 3 | 1 | | 7 | J Veselý | 6 | 2 | 7$^7$ | | | | | | | | |
| 7 | J Veselý | 6 | 6 | | | | | | | | | | | | M Jaziri | 6 | 6 |
| | | | | | | | | | | | | | | | L Đere | 3 | 2 |
| | | | | | 3 | A Seppi | 3 | 7$^7$ | 3 | | | | | | | | |
| | L Đere | 7$^7$ | 7$^8$ | | | L Đere | 6 | 6$^4$ | 6 | | | | | | | | |
| | D Istomin | 6$^5$ | 6$^6$ | | | | | | | | L Đere | 6$^5$ | 7 | 7$^7$ | | | |
| Q | M Trungelliti | 4 | 6 | 6 | | | | | | 5 | P Lorenzi | 7$^7$ | 5 | 6$^3$ | | | |
| Q | E Ymer | 6 | 3 | 2 | Q | M Trungelliti | 2 | 6$^5$ | | | | | | | | | |
| WC | C İlkel | 2 | 3 | | 5 | P Lorenzi | 6 | 7$^7$ | | | | | | | | | |
| 5 | P Lorenzi | 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 | Semifinals | Semifinals | Semifinals | Semifinals |
| 6 | V Troicki | 3 | 6 | 7 | | | | | | | | | | | | | |
| WC | B Tomic | 6 | 0 | 5 | 6 | V Troicki | 2 | 3 | | | | | | | | | |
| | R Albot | 4 | 4 | | | R Dutra Silva | 6 | 6 | | | | | | | | | |
| | R Dutra Silva | 6 | 6 | | | | | | | R Dutra Silva | 6 | 1 | 4 | | | | |
| | T Daniel | 7 | 6 | | | | | | | T Daniel | 1 | 6 | 6 | | | | |
| | M Berrettini | 5 | 3 | | | T Daniel | 6 | 6 | | | | | | | | | |
| | | | | | 4 | A Bedene | 2 | 2 | | | | | | | | | |
| | | | | | | | | | | | | | | T Daniel | 6 | 4 | 6 |
| 8 | N Basilashvili | 5 | 3 | | | | | | | | | | | J Chardy | 3 | 6 | 4 |
| | J Chardy | 7 | 6 | | | J Chardy | 4 | 7$^7$ | 6 | | | | | | | | |
| | J Millman | 4 | 0 | | | D Lajović | 6 | 6$^3$ | 2 | | | | | | | | |
| | D Lajović | 6 | 6 | | | | | | | J Chardy | 6 | 6 | | | | | |
| | T Fabbiano | 6 | 6 | | | | | | | T Fabbiano | 2 | 2 | | | | | |
| | M Youzhny | 1 | 1 | | | T Fabbiano | 6 | 0 | 6 | | | | | | | | |
| | | | | | 2 | D Džumhur | 2 | 6 | 2 | | | | | | | | |

## Qualifying
### Seeds

* Ramkumar Ramanathan (qualifying competition)
* Ilya Ivashka (first round)
* Thiago Monteiro (qualified)
* Elias Ymer (qualified)
* Sebastian Ofner (first round)
* Viktor Galović (first round)
* Hubert Hurkacz (qualifying competition)
* Stefano Napolitano (qualifying competition)

### Qualifiers

* Marco Trungelliti
* Daniel Gimeno Traver
* Thiago Monteiro
* Elias Ymer

### Qualifying draw
#### First qualifier

| First round | First round | First round | First round | Qualifying competition | Qualifying competition | Qualifying competition | Qualifying competition |
| 1 | Ramkumar Ramanathan | 6 | 6 | | | | |
| | Aldin Šetkić | 4 | 3 | | | | |
| | Aldin Šetkić | 4 | 3 | 1 | Ramkumar Ramanathan | 4 | 3 |
| | | | | | Marco Trungelliti | 6 | 6 |
| | Marco Trungelliti | 6 | 6 | | Marco Trungelliti | 6 | 6 |
| 5 | Sebastian Ofner | 3 | 2 | | | | |

#### Second qualifier

| First round | First round | First round | First round | Qualifying competition | Qualifying competition | Qualifying competition | Qualifying competition |
| 2 | Ilya Ivashka | 6$^2$ | 2 | | | | |
| | Daniel Gimeno Traver | 7$^7$ | 6 | | | | |
| | Daniel Gimeno Traver | 7$^7$ | 6 | | Daniel Gimeno Traver | 7$^7$ | 6 |
| | | | | 8 | Stefano Napolitano | 6$^5$ | 3 |
| | Tobias Kamke | 2 | 4 | 8 | Stefano Napolitano | 6$^5$ | 3 |
| 8 | Stefano Napolitano | 6 | 6 | | | | |

#### Third qualifier

| First round | First round | First round | First round | Qualifying competition | Qualifying competition | Qualifying competition | Qualifying competition |
| 3 | Thiago Monteiro | 6 | 6 | | | | |
| WC | Mert Alkaya | 3 | 1 | | | | |
| WC | Mert Alkaya | 3 | 1 | 3 | Thiago Monteiro | 6 | 7$^7$ |
| | | | | | Tommy Robredo | 3 | 6$^5$ |
| | Tommy Robredo | 6 | 6 | | Tommy Robredo | 3 | 6$^5$ |
| 6 | Viktor Galović | 3 | 4 | | | | |

#### Fourth qualifier

| First round | First round | First round | First round | Qualifying competition | Qualifying competition | Qualifying competition | Qualifying competition | Qualifying competition |
| 4 | Elias Ymer | 7$^8$ | 6 | | | | | |
| | Václav Šafránek | 6$^6$ | 1 | | | | | |
| | Václav Šafránek | 6$^6$ | 1 | 4 | Elias Ymer | 6$^4$ | 6 | 7 |
| | | | | 7 | Hubert Hurkacz | 7$^7$ | 4 | 5 |
| WC | Sarp Ağabigün | 2 | 3 | 7 | Hubert Hurkacz | 7$^7$ | 4 | 5 |
| 7 | Hubert Hurkacz | 6 | 6 | | | | | |