Stadium: Central Round: 26 Ground: Hardcourt indoor
| Challenger Orleans MD | 2021/10/01 10:00 | Lammons/Pel v Walkow/Zielinski | 7-5,7-6 |
| Challenger Orleans MD | 2021/09/29 15:20 | Walkow/Zielinski v Fils/Mpetshi Perricard | 6-3,6-4 |
| Challenger Szczecin MD | 2021/09/16 14:00 | Walkow/Zielinski v Goransson/Lammons | 7-6,3-6,0-10 |
| Challenger Szczecin MD | 2021/09/15 16:05 | Margaroli/Vega Hernandez v Walkow/Zielinski | 3-6,4-6 |
| Challenger Meerbusch MD | 2021/08/14 15:00 | Brown/Haase v Walkow/Zielinski | 3-6,1-6 |
| Challenger Meerbusch MD | 2021/08/13 09:00 | de Jong/Stevens v Walkow/Zielinski | 2-6,7-6,9-11 |
| Challenger Meerbusch MD | 2021/08/12 10:00 | Walkow/Zielinski v Sabanov/Sabanov | 7-6,6-4 |
| Challenger Meerbusch MD | 2021/08/11 13:00 | Ficovich/Kicker v Walkow/Zielinski | 3-6,2-6 |