2021 Hamburg European Open – Men's doubles
| Men's doubles | |
|---|---|
| 2021 Hamburg European Open | |
| Champions | Tim Pütz Michael Venus |
| Runners-up | Kevin Krawietz Horia Tecău |
| Score | 6–3, 6–7(3–7), [10–8] |
John Peers and Michael Venus were the defending champions, but Peers chose not to participate this year.
Venus played alongside Tim Pütz and successfully defended his title, defeating Kevin Krawietz and Horia Tecău in the final, 6–3, 6–7(3–7), [10–8].