| 2013 Sibiu Open | |
|---|---|
| Date | 23 – 29 September |
| Edition | 2nd |
| Location | Sibiu, Romania |
| Champions | |
| Singles | |
 Jaroslav Pospíšil | |
| Doubles | |
 Rameez Junaid /  Philipp Oswald | |
The 2013 Sibiu Open was a professional tennis tournament played on clay courts. It was the second edition of the tournament which was part of the 2013 ATP Challenger Tour. It takes place in Sibiu, Romania between 23 and 29 September 2013.
| Country | Player | Rank1 | Seed |
|---|---|---|---|
 ITA | Filippo Volandri | 91 | 1 |
| CZE | Jan Hájek | 103 | 2 |
 GER | Julian Reister | 107 | 3 |
| AUT | Andreas Haider-Maurer | 108 | 4 |
 ROU | Adrian Ungur | 117 | 5 |
 SRB | Dušan Lajović | 144 | 6 |
 ESP | |||
| ITA | Marco Cecchinato | 185 | 8 |
 NED | Thomas Schoorel | 192 | 9 |
The following players received wildcards into the singles main draw:
Alexandru-Daniel Carpen Rareș Ispas Florin Mergea Filippo Volandri The following players received entry from the qualifying draw:
The following players received entry as a lucky loser the singles main draw:
Jaroslav Pospíšil def. Marco Cecchinato 4–6, 6–4, 6–1 Rameez Junaid / Philipp Oswald def. 
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