Stadium: Court 1 Round: 28 Ground: Clay
| ATP Gstaad MD | 2021/07/19 08:30 | Paul/Riedi v King/Schnur | 6-3,6-4 |
| ATP Gstaad MD | 2021/07/22 09:00 | Walkow/Zielinski v Brown/Weissborn | 6-4,6-7,10-7 |
| Challenger Braunschweig MD | 2021/07/10 11:30 | Sabanov/Sabanov v Walkow/Zielinski | 4-6,6-4,4-10 |
| Challenger Braunschweig MD | 2021/07/08 14:50 | Duran/Sandkaulen v Walkow/Zielinski | 5-7,4-6 |
| 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 |