| 2021 Halle Open | |
|---|---|
| Date | 14–20 June |
| Edition | 28th |
| Category | ATP Tour 500 |
| Draw | 32S / 24D |
| Surface | Grass |
| Location | Halle, Germany |
| Venue | OWL Arena |
| Champions | |
| Singles | |
 Ugo Humbert[1] | |
| Doubles | |
 Kevin Krawietz /  Horia Tecău[2] | |
The 2021 Halle Open (known for sponsorship reasons as the 2021 Noventi Open) was a men's tennis tournament played on outdoor grass courts. It was the 28th edition of the Halle Open and part of the ATP Tour 500 series of the 2021 ATP Tour. It took place at the OWL Arena in Halle, Germany, between 14 June and 20 June 2021. Unseeded Ugo Humbert won the singles title.[3]
- ^ "2021 Halle – Singles draw". Association of Tennis Professionals (ATP).
- ^ "2021 Halle – Doubles draw". Association of Tennis Professionals (ATP).
- ^ "Halle Overview". ATP Tour. Retrieved 9 June 2019.