Stadium: Court 1 Round: 27 Ground: Hardcourt indoor
| ATP Cologne MD | 2020/10/13 10:00 | Klaasen/Marach v Zverev/Zverev | 2-6,6-4,10-6 |
| French Open MD | 2020/09/29 11:00 | Bonzi/Hoang v Klaasen/Marach | 6-3,3-6,6-2 |
| ATP Hamburg MD | 2020/09/21 16:30 | Krawietz/Mies v Klaasen/Marach | 7-6,6-3 |
| ATP Rome MD | 2020/09/16 09:00 | Purcell/Saville v Klaasen/Marach | 7-5,7-5 |
| US Open MD | 2020/09/02 15:00 | Klaasen/Marach v Daniell/Oswald | 3-6,6-7 |
| ATP New York MD | 2020/08/24 19:45 | Klaasen/Marach v Rojer/Tecau | 3-6,4-6 |
| ATP New York MD | 2020/08/22 17:55 | Klaasen/Marach v Puetz/Zverev | 7-6,3-6,10-6 |
| ATP Dubai MD | 2020/02/29 13:00 | Peers/Venus v Klaasen/Marach | 6-3,6-2 |
| ATP Cologne MD | 2020/10/14 13:50 | Davidovich Fokina/Verdasco v Masur/Molleker | 3-6,6-1,10-8 |