# 2017 Sibiu Open – Singles

Robin Haase was the defending champion but chose not to defend his title.
Cedrik-Marcel Stebe won the title after defeating Carlos Taberner 6–3, 6–3 in the final.

## Seeds

* Cedrik-Marcel Stebe (champion)
* Laslo Đere (first round)
* Marco Cecchinato (second round)
* Roberto Carballés Baena (second round)
* Maximilian Marterer (semifinals)
* Bjorn Fratangelo (quarterfinals)
* Stefano Travaglia (quarterfinals)
* Taro Daniel (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 | Final |
| 1 | Cedrik-Marcel Stebe | 6 | 6 | | | | |
| 5 | Maximilian Marterer | 2 | 1 | | | | |
| 5 | Maximilian Marterer | 2 | 1 | 1 | Cedrik-Marcel Stebe | 6 | 6 |
| | | | | | Carlos Taberner | 3 | 3 |
| WC | Adrian Ungur | 3 | 0 | | Carlos Taberner | 3 | 3 |
| | Carlos Taberner | 6 | 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 | C-M Stebe | 7$^7$ | 7$^7$ | | | | | | | | | | | | | | |
| WC | Vlad Andrei Dancu | 6$^4$ | 6$^4$ | | 1 | C-M Stebe | 2 | 7$^8$ | 6 | | | | | | | | |
| | Í Cervantes | 7$^7$ | 6 | | | Í Cervantes | 6 | 6$^6$ | 2 | | | | | | | | |
| | A Arnaboldi | 6$^2$ | 1 | | | | | | | 1 | C-M Stebe | 6 | 6 | | | | |
| | J Šátral | 6 | 6 | | | | | | | | S Napolitano | 0 | 3 | | | | |
| WC | N Serdarušić | 4 | 2 | | | J Šátral | 6 | 4 | 3 | | | | | | | | |
| | S Napolitano | 6 | 1 | 6 | | S Napolitano | 3 | 6 | 6 | | | | | | | | |
| 8 | T Daniel | 2 | 6 | 3 | | | | | | | | | | 1 | C-M Stebe | 6 | 6 |
| 4 | R Carballés Baena | 6 | 6 | | | | | | | | | | | 5 | M Marterer | 2 | 1 |
| Q | A Lazov | 3 | 4 | | 4 | R Carballés Baena | 5 | 5 | | | | | | | | | |
| | V Šafránek | 1 | 0$^r$ | | | C Ruud | 7 | 7 | | | | | | | | | |
| | C Ruud | 6 | 3 | | | | | | | | C Ruud | 6$^4$ | 3 | | | | |
| Q | M Donati | 6 | 6 | | | | | | | 5 | M Marterer | 7$^7$ | 6 | | | | |
| | T Robredo | 1 | 4 | | Q | M Donati | 4 | 5 | | | | | | | | | |
| | L Grigelis | 1 | 1 | | 5 | M Marterer | 6 | 7 | | | | | | | | | |
| 5 | M Marterer | 6 | 6 | | | | | | | | | | | | | | |

### Bottom half

| First round | First round | First round | First round | First round | Second round | Second round | Second round | Second round | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Semifinals | Semifinals | Semifinals | Semifinals |
| 7 | S Travaglia | 6 | 6 | | | | | | | | | | | | | |
| | L Giustino | 2 | 0 | | 7 | S Travaglia | 6 | 6 | | | | | | | | |
| Q | A Müller | 1 | 5 | | LL | D Kuzmanov | 2 | 0 | | | | | | | | |
| LL | D Kuzmanov | 6 | 7 | | | | | | 7 | S Travaglia | 3 | 1 | | | | |
| | R Ojeda Lara | 1 | 6 | 2 | | | | | WC | A Ungur | 6 | 6 | | | | |
| WC | A Ungur | 6 | 1 | 6 | WC | A Ungur | 7 | 6 | | | | | | | | |
| WC | Michał Dembek | 1 | 5 | | 3 | M Cecchinato | 5 | 3 | | | | | | | | |
| 3 | M Cecchinato | 6 | 7 | | | | | | | | | | WC | A Ungur | 3 | 0 |
| 6 | B Fratangelo | 2 | 6 | 7$^9$ | | | | | | | | | | C Taberner | 6 | 6 |
| | Jeremy Jahn | 6 | 3 | 6$^7$ | 6 | B Fratangelo | 6 | 6 | | | | | | | | |
| | R Bellotti | 6 | 6 | | | R Bellotti | 4 | 2 | | | | | | | | |
| | M Kližan | 3 | 1 | | | | | | 6 | B Fratangelo | 3 | 6$^5$ | | | | |
| | G Oliveira | 2 | 2 | | | | | | | C Taberner | 6 | 7$^7$ | | | | |
| | C Taberner | 6 | 6 | | | C Taberner | 6 | 6 | | | | | | | | |
| Q | Lenny Hampel | 3 | 6 | 6 | Q | L Hampel | 1 | 2 | | | | | | | | |
| 2 | L Đere | 6 | 4 | 1 | | | | | | | | | | | | |