| 21. Round | 12/01/2021 | AFC Bournemouth | - | Millwall FC | 1:1 | ||||
| 24. Round | 16/01/2021 | Nottingham Forest | - | Millwall FC | 3:1 | ||||
| 25. Round | 20/01/2021 | Huddersfield Town | - | Millwall FC | 0:1 |  |
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| 22. Round | 26/01/2021 | Millwall FC | - | Watford FC | 0:0 | ||||
| 27. Round | 30/01/2021 | Cardiff City | - | Millwall FC | 1:1 | ||||
| 26. Round | 02/02/2021 | Millwall FC | - | Norwich City | 0:0 | ||||
| 35. Round | 06/03/2021 | Millwall FC | - | Blackburn Rovers | 0:2 | ||||
| 38. Round | 20/03/2021 | Millwall FC | - | Middlesbrough FC | 1:0 | |
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| 39. Round | 02/04/2021 | Millwall FC | - | Rotherham United | 1:0 | ||||
| 40. Round | 05/04/2021 | Stoke City | - | Millwall FC | 1:2 | ||||
| 41. Round | 10/04/2021 | Millwall FC | - | Swansea City | 0:3 | ||||
| 42. Round | 17/04/2021 | Brentford FC | - | Millwall FC | 0:0 | ||||
| 43. Round | 21/04/2021 | Millwall FC | - | AFC Bournemouth | 1:4 | |
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| 44. Round | 24/04/2021 | Watford FC | - | Millwall FC | 1:0 | ||||
| 45. Round | 01/05/2021 | Millwall FC | - | Bristol City | 4:1 | |
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| 46. Round | 08/05/2021 | Coventry City | - | Millwall FC | 6:1 | |
England