Stadium: B & B Court Round: 29 Ground: Clay
| Challenger Meerbusch MD | 2021/08/13 15:00 | Sancic/Sitak v Brown/Haase | 4-6,4-6 |
| Challenger Meerbusch MD | 2021/08/12 14:00 | Brown/Haase v Gonzales/Johnson | 6-0,6-4 |
| Challenger Meerbusch MD | 2021/08/11 10:30 | Brown/Haase v Verdugo/Reyes-Varela | 6-4,6-2 |
| 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 |
| Challenger Poznan MD | 2021/07/29 16:25 | Gonzales/Johnson v Walkow/Zielinski | 2-6,7-6,13-11 |
| Challenger Poznan MD | 2021/07/28 14:10 | Domingues/Elias v Walkow/Zielinski | 2-6,2-6 |
| ATP Gstaad MD | 2021/07/25 11:20 | Huesler/Stricker v Walkow/Zielinski | 6-1,7-6 |
| ATP Gstaad MD | 2021/07/23 10:45 | Paul/Riedi v Walkow/Zielinski | 6-4,6-7,2-10 |
| ATP Gstaad MD | 2021/07/22 09:00 | Walkow/Zielinski v Brown/Weissborn | 6-4,6-7,10-7 |