The 2017 Sibiu Open was a professional tennis tournament played on clay courts. It was the sixth edition of the tournament which was part of the 2017 ATP Challenger Tour. It took place in Sibiu, Romania between 18 and 24 September 2017.
Singles main-draw entrants
Seeds
1 Rankings are as of 11 September 2017.
Other entrants
The following players received wildcards into the singles main draw: Vlad Andrei Dancu Michał Dembek Nino Serdarušić Adrian Ungur
The following players received entry from the qualifying draw: Matteo Donati Lenny Hampel Alexandar Lazov Alexandre Müller
The following player received entry as a lucky loser: Dimitar Kuzmanov
Champions
Singles
Cedrik-Marcel Stebe def. Carlos Taberner 6–3, 6–3.
Doubles
Marco Cecchinato / Matteo Donati def. Sander Gillé / Joran Vliegen 6–3, 6–1.