| 1. Round | 12/09/2020 | Accrington Stanley | - | Peterborough United | 2:0 | ||||
| 2. Round | 19/09/2020 | Peterborough United | - | Fleetwood Town | 2:1 | ||||
| 3. Round | 26/09/2020 | Sunderland AFC | - | Peterborough United | 1:0 | ||||
| 4. Round | 03/10/2020 | Peterborough United | - | Swindon Town | 3:1 |  |
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| 5. Round | 10/10/2020 | Northampton Town | - | Peterborough United | 0:2 | ||||
| 6. Round | 17/10/2020 | Peterborough United | - | Oxford United | 2:0 | ||||
| 7. Round | 20/10/2020 | Wigan Athletic | - | Peterborough United | 0:1 | ||||
| 8. Round | 24/10/2020 | Hull City | - | Peterborough United | 1:2 | ||||
| 9. Round | 27/10/2020 | Peterborough United | - | Burton Albion | 2:2 | ||||
| 13. Round | 21/11/2020 | Peterborough United | - | Blackpool FC | 1:2 | ||||
| 14. Round | 24/11/2020 | Peterborough United | - | Plymouth Argyle | 1:0 | ||||
| 15. Round | 02/12/2020 | AFC Wimbledon | - | Peterborough United | 2:1 | ||||
| 16. Round | 05/12/2020 | Portsmouth FC | - | Peterborough United | 2:0 | ||||
| 17. Round | 12/12/2020 | Peterborough United | - | Rochdale AFC | 4:1 | ||||
| 23. Round | 09/01/2021 | Lincoln City | - | Peterborough United | 1:1 |
Wales