Head to Head
| England U23 Development League | 2020/11/25 11:00 | Millwall U23 v Cardiff U23 | L | 2-0 |
| England U23 Development League | 2020/02/03 14:00 | Millwall U23 v Cardiff U23 | L | 3-0 |
| England U23 Development League | 2019/10/07 12:00 | Cardiff U23 v Millwall U23 | W | 2-1 |
| England U23 Development League | 2019/02/18 13:31 | Millwall U23 v Cardiff U23 | W | 0-1 |
| England U23 Development League | 2018/09/24 11:57 | Cardiff U23 v Millwall U23 | D | 2-2 |
| England U23 Development League | 2018/01/08 11:58 | Cardiff U23 v Millwall U23 | D | 1-1 |
| England U23 Development League | 2017/10/16 13:25 | Millwall U23 v Cardiff U23 | D | 1-1 |
| England U23 Development League | 2017/01/30 14:00 | Cardiff U23 v Millwall U23 | D | 1-1 |