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 | |
| Champions |  John Peers Michael Venus |
| Runners-up |  Ivan Dodig Mate Pavić |
| Score | 6–3, 6–4 |
John Peers and Michael Venus won the title, defeating Ivan Dodig and Mate Pavić in the final, 6–3, 6–4.
Seeds edit
Juan Sebastián Cabal / Robert Farah (first round, retired)
Rajeev Ram / 
Joe Salisbury (first round)
Łukasz Kubot / 
Marcelo Melo (quarterfinals)
Marcel Granollers / 
Horacio Zeballos (withdrew)
Draw edit
Key edit
- Q = Qualifier
- WC = Wild card
- LL = Lucky loser
- Alt = Alternate
- SE = Special exempt
- PR = Protected ranking
- ITF = ITF entry
- JE = Junior exempt
- w/o = Walkover
- r = Retired
- d = Defaulted
- SR = Special ranking
Draw edit
| 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] | |||||||||||||||||||||||
Qualifying edit
Seeds edit
- Marcelo Demoliner /
Matwé Middelkoop (qualifying competition, withdrew) 
Radu Albot / 
Aisam-ul-Haq Qureshi (qualified)
Qualifiers edit
Lucky losers edit
Qualifying draw edit
| 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] | |||||||||