Cardiff City v Millwall, 21 August 2021
| Score | 3-1 to Cardiff City |
| Competition | League Championship |
| Venue | Cardiff City Stadium |
| Attendance | 18,168 |
View Cardiff City v Millwall head to head
Kick-off: 3.00pm
| Score | 3-1 to Cardiff City |
| Competition | League Championship |
| Venue | Cardiff City Stadium |
| Attendance | 18,168 |
View Cardiff City v Millwall head to head