Face à face
| England U23 Development League | 2021/02/16 13:00 | Cardiff City v Millwall | W | 3-0 |
| England U23 Development League | 2020/11/25 11:00 | Millwall v Cardiff City | L | 2-0 |
| England U23 Development League | 2020/02/03 14:00 | Millwall v Cardiff City | L | 3-0 |
| England U23 Development League | 2019/10/07 12:00 | Cardiff City v Millwall | W | 2-1 |
| England U23 Development League | 2019/02/18 13:31 | Millwall v Cardiff City | W | 0-1 |
| England U23 Development League | 2018/09/24 11:57 | Cardiff City v Millwall | D | 2-2 |
| England U23 Development League | 2018/01/08 11:58 | Cardiff City v Millwall | D | 1-1 |
| England U23 Development League | 2017/10/16 13:25 | Millwall v Cardiff City | D | 1-1 |
Home History
| England U23 Development League | 2021/09/21 12:00 | Cardiff City v Sheff Utd | W | 2-0 |
| England U23 Development League | 2021/09/10 10:00 | Sheffield v Cardiff City | W | 0-3 |
| England U23 Development League | 2021/08/29 14:00 | Cardiff City v Peterborough U23 | W | 3-1 |
| England U23 Development League | 2021/08/16 12:00 | Cardiff City v Wigan | W | 1-0 |
| England U23 Development League | 2021/05/03 14:00 | Barnsley v Cardiff City | D | 1-1 |
| England U23 Development League | 2021/04/27 12:00 | Cardiff City v Coventry City Reserve | L | 1-6 |
| England U23 Development League | 2021/04/23 18:00 | Nottingham Forest v Cardiff City | W | 1-2 |
| England U23 Development League | 2021/04/13 12:00 | Cardiff City v Sheff Utd | L | 0-2 |
Away History
| England U23 Development League | 2021/09/21 13:00 | Millwall v Barnsley | W | 4-0 |
| England U23 Development League | 2021/09/13 12:00 | Coventry City Reserve v Millwall | L | 4-1 |
| England U23 Development League | 2021/08/23 18:00 | Hull City v Millwall | L | 3-1 |
| England U23 Development League | 2021/08/17 12:00 | Millwall v Crewe Alexandra | W | 1-0 |
| Matchs amicaux | 2021/07/27 18:15 | Eastbourne Borough v Millwall | L | 2-1 |
| Matchs amicaux | 2021/07/15 18:30 | Dulwich v Millwall | W | 0-2 |
| England U23 Development League | 2021/05/04 16:30 | Hull City v Millwall | W | 0-2 |
| England U23 Development League | 2021/04/27 13:00 | Millwall v Sheff Utd | L | 1-2 |