| 25. Round | 06/02/2021 | Alemannia Aachen | - | Fortuna Düsseldorf II | 0:2 | ||||
| 15. Round | 20/02/2021 | FC Wegberg-Beeck | - | Alemannia Aachen | 2:3 | ||||
| 28. Round | 27/02/2021 | Bor. Mönchengladbach II | - | Alemannia Aachen | 1:2 | ||||
| 27. Round | 03/03/2021 | Alemannia Aachen | - | Preußen Münster | 1:4 | ||||
| 29. Round | 06/03/2021 | Rot-Weiß Oberhausen | - | Alemannia Aachen | 3:1 | ||||
| 30. Round | 13/03/2021 | FC Schalke 04 II | - | Alemannia Aachen | 2:2 | ||||
| 24. Round | 17/03/2021 | SV Lippstadt 08 | - | Alemannia Aachen | 2:0 | ||||
| 26. Round | 24/03/2021 | Fortuna Köln | - | Alemannia Aachen | 2:2 | ||||
| 32. Round | 27/03/2021 | SV Bergisch Gladbach 09 | - | Alemannia Aachen | 0:0 | ||||
| 33. Round | 03/04/2021 | Alemannia Aachen | - | SV 19 Straelen | 2:3 |  |
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| 34. Round | 07/04/2021 | VfB Homberg | - | Alemannia Aachen | 0:2 | ||||
| 36. Round | 17/04/2021 | Alemannia Aachen | - | FC Wegberg-Beeck | 1:1 |  |
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| 40. Round | 22/05/2021 | Alemannia Aachen | - | SC Wiedenbrück | 0:3 |
Germany