| 1. Round | 07/08/2021 | Luton Town | - | Peterborough United | 3:0 | ||||
| 2. Round | 14/08/2021 | Peterborough United | - | Derby County | 2:1 | ||||
| 3. Round | 17/08/2021 | Peterborough United | - | Cardiff City | 2:2 | ||||
| 4. Round | 21/08/2021 | Preston North End | - | Peterborough United | 1:0 | ||||
| 5. Round | 28/08/2021 | Peterborough United | - | West Bromwich Albion | 0:1 | ||||
| 6. Round | 11/09/2021 | Sheffield United | - | Peterborough United | 6:2 | ||||
| 7. Round | 14/09/2021 | Reading FC | - | Peterborough United | 3:1 |
England