2021 Banja Luka Challenger
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| 2021 Banja Luka Challenger | |
|---|---|
| Date | 6–12 September |
| Edition | 19th |
| Surface | Clay |
| Location | Banja Luka, Bosnia and Herzegovina |
| Champions | |
| Singles | |
 Juan Manuel Cerúndolo | |
| Doubles | |
 Antonio Šančić / Nino Serdarušić | |
The 2021 Banja Luka Challenger was a professional tennis tournament played on clay courts. It was the nineteenth edition of the tournament which was part of the 2021 ATP Challenger Tour. It took place in Banja Luka, Bosnia and Herzegovina from 6 to 12 September 2021.
