# 2015 Sibiu Open – Singles

Jason Kubler was the defending champion but chose not to compete this year.

## Seeds

* Dušan Lajović (quarterfinals)
* Tobias Kamke (first round)
* Laslo Djere (first round)
* Germain Gigounon (second round)
* Gianluca Naso (first round)
* Calvin Hemery (second round)
* Tristan Lamasine (second round)
* Jan Mertl (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 |
| | Adrian Ungur | 6 | 6 | | | | |
| Q | Petru-Alexandru Luncanu | 1 | 1 | | | | |
| Q | Petru-Alexandru Luncanu | 1 | 1 | Adrian Ungur | 6 | 3 | 7 |
| | | | | Pere Riba | 4 | 6 | 5 |
| | Pere Riba | 6 | 7 | Pere Riba | 4 | 6 | 5 |
| | Miljan Zekić | 3 | 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 | D Lajović | 6 | 6 | | | | | | | | | | | | | | | |
| WC | D Dima | 2 | 4 | | 1 | D Lajović | 3 | | | | | | | | | | | |
| Q | Marc Giner | 3 | 6 | 5 | LL | AS Apostol | 0$^r$ | | | | | | | | | | | |
| LL | Andrei Stefan Apostol | 6 | 1 | 7 | | | | | | 1 | D Lajović | 4 | 6 | 3 | | | | |
| | A Ungur | 6 | 3 | 6 | | | | | | | A Ungur | 6 | 2 | 6 | | | | |
| | Maxime Tabatruong | 2 | 6 | 2 | | A Ungur | 6 | 6 | | | | | | | | | | |
| | A Giannessi | 6 | 4 | 4 | 7 | T Lamasine | 4 | 4 | | | | | | | | | | |
| 7 | T Lamasine | 3 | 6 | 6 | | | | | | | | | | | | A Ungur | 6 | 6 |
| 3 | L Djere | 2 | 4 | | | | | | | | | | | | Q | P-A Luncanu | 1 | 1 |
| Q | P-A Luncanu | 6 | 6 | | Q | P-A Luncanu | 6 | 4 | 6 | | | | | | | | | |
| | M Chazal | 6 | 6 | | | M Chazal | 4 | 6 | 3 | | | | | | | | | |
| WC | Michal Dembek | 2 | 1 | | | | | | | Q | P-A Luncanu | 7 | 6$^7$ | 6 | | | | |
| Q | Riccardo Sinicropi | 2 | 1 | | | | | | | | D Kuzmanov | 5 | 7$^9$ | 3 | | | | |
| | J Cagnina | 6 | 6 | | | J Cagnina | 3 | 6$^1$ | | | | | | | | | | |
| | D Kuzmanov | 6 | 5 | 7 | | D Kuzmanov | 6 | 7$^7$ | | | | | | | | | | |
| 8 | J Mertl | 3 | 7 | 5 | | | | | | | | | | | | | | |

### 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 |
| 5 | G Naso | 6$^5$ | 4 | | | | | | | | | | | | | |
| WC | V Crivoi | 7$^7$ | 6 | | WC | V Crivoi | 7$^9$ | 3 | 6 | | | | | | | |
| | F Horanský | 7 | | | | F Horanský | 6$^7$ | 6 | 3 | | | | | | | |
| | P Krstin | 5$^r$ | | | | | | | | WC | V Crivoi | 4 | 0 | | | |
| | V Hănescu | 6 | 3 | 4 | | | | | | | P Riba | 6 | 6 | | | |
| | P Riba | 4 | 6 | 6 | | P Riba | 6 | 6$^0$ | 6 | | | | | | | |
| | Omar Giacalone | 6$^7$ | 4 | | 4 | G Gigounon | 0 | 7$^7$ | 4 | | | | | | | |
| 4 | G Gigounon | 7$^9$ | 6 | | | | | | | | | | | P Riba | 6 | 7 |
| 6 | C Hemery | 7$^7$ | 6 | | | | | | | | | | | M Zekić | 3 | 5 |
| Q | S Diez | 6$^1$ | 4 | | 6 | C Hemery | 6 | 3 | 2 | | | | | | | |
| WC | VV Cornea | 4 | 6 | 3 | | G Mager | 3 | 6 | 6 | | | | | | | |
| | G Mager | 6 | 2 | 6 | | | | | | | G Mager | 3 | 5 | | | |
| | T Brkić | 7$^7$ | 4 | 2 | | | | | | | M Zekić | 6 | 7 | | | |
| | M Zekić | 6$^4$ | 6 | 6 | | M Zekić | 6 | 4 | 7$^7$ | | | | | | | |
| | J Kovalík | 6 | 7$^7$ | | | J Kovalík | 2 | 6 | 6$^0$ | | | | | | | |
| 2 | T Kamke | 4 | 6$^3$ | | | | | | | | | | | | | |