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| 2021 Belgrade Open | |
|---|---|
| Date | 23–29 May |
| Edition | 1st |
| Category | ATP Tour 250 |
| Draw | 28S / 16D |
| Prize money | €255,500 |
| Surface | Clay |
| Location | Belgrade, Serbia |
| Venue | Novak Tennis Center |
| Champions | |
| Singles | |
 Novak Djokovic | |
| Doubles | |
 Jonathan Erlich /  Andrei Vasilevski | |
The 2021 Belgrade Open was a tournament on the 2021 ATP Tour. It was played on outdoor clay courts in Belgrade, Serbia. It was organised with a single-year licence in 2021, and was held at Novak Tennis Center from May 23 to 29, 2021.[1]
