Stadium: Court 1 Round: 27 Ground: Carpet indoor
| Challenger Ismaning - Herredouble | 2021/10/27 10:30 | Nedunchezhiyan/Raja v Walkow/Zielinski | 5-7,6-7 |
| Challenger Mouilleron le Captif - Herredouble | 2021/10/06 14:30 | Droguet/Mayot v Walkow/Zielinski | 6-4,6-4 |
| Challenger Orleans - Herredouble | 2021/10/01 10:00 | Lammons/Pel v Walkow/Zielinski | 7-5,7-6 |
| Challenger Orleans - Herredouble | 2021/09/29 15:20 | Walkow/Zielinski v Fils/M Perricard | 6-3,6-4 |
| Challenger Szczecin - Herredouble | 2021/09/16 14:00 | Walkow/Zielinski v Goransson/Lammons | 7-6,3-6,0-10 |
| Challenger Szczecin - Herredouble | 2021/09/15 16:05 | Margaroli/Vega Hernandez v Walkow/Zielinski | 3-6,4-6 |
| Challenger Meerbusch - Herredobbel | 2021/08/14 15:00 | Brown/Haase v Walkow/Zielinski | 3-6,1-6 |
| Challenger Meerbusch - Herredobbel | 2021/08/13 09:00 | De Jong/Stevens v Walkow/Zielinski | 2-6,7-6,9-11 |