2021 Sibiu Open
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| 2021 Sibiu Open | |
|---|---|
| Date | 27 September – 3 October |
| Edition | 10th |
| Location | Sibiu, Romania |
| Champions | |
| Singles | |
 Stefano Travaglia | |
| Doubles | |
 Alexander Erler / Lucas Miedler | |
The 2021 Sibiu Open was a professional tennis tournament played on clay courts. It was the tenth edition of the tournament which was part of the 2021 ATP Challenger Tour. It took place in Sibiu, Romania between 27 September and 3 October 2021.
