Stadium: Court 7 Round: 27 Ground: Clay
| Challenger Braunschweig MD | 2021/07/06 16:00 | Duran/Sandkaulen v Nino Ehrenschneider/Lane | 6-2,6-2 |
| Challenger Braunschweig MD | 2021/07/07 11:35 | Walkow/Zielinski v Cerretani/Zelenay | 6-3,6-4 |
| Challenger Milan MD | 2021/06/25 16:25 | Brown/Weissborn v Walkow/Zielinski | 7-5,6-4 |
| Challenger Milan MD | 2021/06/24 13:00 | Bonadio/Gabashvili v Walkow/Zielinski | 2-6,1-6 |
| Challenger Milan MD | 2021/06/23 15:00 | Brancaccio/Zeppieri v Walkow/Zielinski | 6-7,4-6 |
| Challenger Aix en Provence MD | 2021/06/18 15:40 | Walkow/Zielinski v Doumbia/Reboul | 6-7,4-6 |
| Challenger Aix en Provence MD | 2021/06/17 09:00 | Walkow/Zielinski v Lamasine/Olivetti | 6-4,7-5 |
| Challenger Aix en Provence MD | 2021/06/16 11:20 | Matos/Molchanov v Walkow/Zielinski | 0-6,7-6,8-10 |
| Challenger Lyon MD | 2021/06/11 13:30 | Walkow/Zielinski v Cuevas/Cuevas | 6-7,7-6,8-10 |