Oliver Marach and Jürgen Melzer were the defending champions, but Melzer chose not to participate this year. Marach played alongside Raven Klaasen, but lost in the first round to Kevin Krawietz and Andreas Mies.
| Doubles | ||||
|---|---|---|---|---|
| 2020 Hamburg European Open | ||||
| Final | ||||
| Champions |  John Peers Michael Venus | |||
| Runners-up |  Ivan Dodig Mate Pavić | |||
| Score | 6–3, 6–4 | |||
| Events | ||||
| ||||
| ||||
John Peers and Michael Venus won the title, defeating Ivan Dodig and Mate Pavić in the final, 6–3, 6–4.
Juan Sebastián Cabal / Robert Farah (first round, retired)
Rajeev Ram / 
Joe Salisbury (first round)
Łukasz Kubot / 
Marcelo Melo (quarterfinals)
Marcel Granollers / 
Horacio Zeballos (withdrew)| First round | Quarterfinals | Semifinals | Final | ||||||||||||||||||||||||
| 1 | JS Cabal R Farah
| 6r | |||||||||||||||||||||||||
 J-J Rojer H Tecău
| 6 | J-J Rojer H Tecău
| 6 | 7 | |||||||||||||||||||||||
| WC |  F Nielsen T Pütz
| 5 | 5 |  N Mahut F Martin
| 3 | 5 | |||||||||||||||||||||
| N Mahut F Martin
| 7 | 7 | J-J Rojer H Tecău
| 6 | 5 | [6] | |||||||||||||||||||||
| 3 | Ł Kubot M Melo
| 78 | 1 | [10] | J Peers M Venus
| 3 | 7 | [10] | |||||||||||||||||||
| WC | Y Hanfmann M Moraing
| 66 | 6 | [5] | 3 | Ł Kubot M Melo
| 1 | 2 | |||||||||||||||||||
 F Fognini H Kontinen
| 1 | 4 | J Peers M Venus
| 6 | 6 | ||||||||||||||||||||||
| J Peers M Venus
| 6 | 6 | J Peers M Venus
| 6 | 6 | ||||||||||||||||||||||
| J Murray N Skupski
| 6 | 5 | [8] | I Dodig M Pavić
| 3 | 4 | |||||||||||||||||||||
| Q |  R Albot A-u-H Qureshi
| 0 | 7 | [10] | Q | R Albot A-u-H Qureshi
| 4 | 2 | |||||||||||||||||||
| I Dodig M Pavić
| 6 | 3 | [10] | I Dodig M Pavić
| 6 | 6 | |||||||||||||||||||||
| LL | M Möller M Welte
| 3 | 6 | [6] | I Dodig M Pavić
| 6 | 6 | ||||||||||||||||||||
| K Krawietz A Mies
| 77 | 6 | W Koolhof N Mektić
| 4 | 4 | ||||||||||||||||||||||
 R Klaasen O Marach
| 65 | 3 | K Krawietz A Mies
| 3 | 5 | ||||||||||||||||||||||
| W Koolhof N Mektić
| 6 | 60 | [12] | W Koolhof N Mektić
| 6 | 7 | |||||||||||||||||||||
| 2 | R Ram J Salisbury
| 4 | 77 | [10] | |||||||||||||||||||||||
Marcelo Demoliner / Matwé Middelkoop (qualifying competition, withdrew) Radu Albot / Aisam-ul-Haq Qureshi (qualified)| First round | Qualifying competition | ||||||||||||
| 1 | Marcelo Demoliner Matwé Middelkoop
| 6 | 2 | [10] | |||||||||
| WC | Marvin Möller Milan Welte
| 1 | 6 | [7] | |||||||||
| 1 | Marcelo Demoliner Matwé Middelkoop
| ||||||||||||
| 2 | Radu Albot Aisam-ul-Haq Qureshi
| w/o | |||||||||||
| Taylor Fritz Tommy Paul
| 4 | 77 | [5] | ||||||||||
| 2 | Radu Albot Aisam-ul-Haq Qureshi
| 6 | 65 | [10] | |||||||||