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.
| Country | Player | Rank1 | Seed | |
|---|---|---|---|---|
| Cedrik-Marcel Stebe | 90 | 1 | ||
 Serbia | Laslo Đere | 95 | 2 | |
 Italy | Marco Cecchinato | 99 | 3 | |
 Spain | Roberto Carballés Baena | 106 | 4 | |
| Maximilian Marterer | 121 | 5 | ||
| Bjorn Fratangelo | 124 | 6 | ||
| Italy | Stefano Travaglia | 125 | 7 | |
 Japan | Taro Daniel | 129 | 8 |
The following players received wildcards into the singles main draw:
Vlad Andrei Dancu
Michał Dembek Adrian UngurThe following players received entry from the qualifying draw:
Matteo Donati
Lenny Hampel
Alexandre MüllerThe following player received entry as a lucky loser:
See main article: 2017 Sibiu Open – Singles.
Carlos Taberner 6–3, 6–3.See main article: 2017 Sibiu Open – Doubles.
Marco Cecchinato / Matteo Donati def. 
Sander Gillé / Joran Vliegen 6–3, 6–1.