Head to Head
| England U23 Development League | 2019/12/09 13:00 | Watford U23 v Cardiff U23 | D | 1-1 |
| England U23 Development League | 2019/03/29 15:01 | Watford U23 v Cardiff U23 | D | 0-0 |
| England U23 Development League | 2018/11/19 19:00 | Cardiff U23 v Watford U23 | W | 2-0 |
| England U23 Premier League Cup | 2018/03/31 13:00 | Watford U23 v Cardiff U23 | W | 0-4 |
| England U23 Premier League Cup | 2018/02/01 13:16 | Cardiff U23 v Watford U23 | D | 1-1 |
| England U23 Development League | 2018/01/15 13:00 | Watford U23 v Cardiff U23 | L | 1-0 |
| England U23 Development League | 2017/10/23 17:59 | Cardiff U23 v Watford U23 | W | 2-0 |
| England U23 Development League | 2017/05/03 12:59 | Watford U23 v Cardiff U23 | L | 3-2 |
Home History
| England U23 Development League | 2020/02/11 19:00 | Cardiff U23 v Bristol City U23 | W | 3-2 |
| England U23 Development League | 2020/02/03 14:00 | Millwall U23 v Cardiff U23 | L | 3-0 |
| England U23 Development League | 2020/01/29 13:00 | Crystal Palace U23 v Cardiff U23 | W | 2-3 |
| England U23 Development League | 2020/01/20 13:00 | Coventry U23 v Cardiff U23 | D | 1-1 |
| England U23 Development League | 2020/01/13 13:00 | Cardiff U23 v Colchester U23 | W | 2-1 |
| England U23 Development League | 2020/01/06 13:00 | Cardiff U23 v Coventry U23 | L | 0-1 |
| England U23 Development League | 2019/12/16 13:00 | QPR U23 v Cardiff U23 | L | 4-1 |
| England U23 Development League | 2019/12/09 13:00 | Watford U23 v Cardiff U23 | D | 1-1 |
Away History
| England U23 Premier League Cup | 2020/02/21 19:00 | Watford U23 v Everton U23 | L | 0-1 |
| England U23 Development League | 2020/02/17 19:00 | Watford U23 v QPR U23 | L | 2-3 |
| England U23 Development League | 2020/02/10 13:00 | Ipswich U23 v Watford U23 | D | 2-2 |
| England U23 Premier League Cup | 2020/02/07 19:00 | Watford U23 v Fulham U23 | W | 1-0 |
| England U23 Development League | 2020/02/03 13:00 | Watford U23 v Charlton U23 | D | 3-3 |
| England U23 Development League | 2020/01/27 13:00 | Colchester U23 v Watford U23 | W | 1-4 |
| England U23 Premier League Cup | 2020/01/20 18:53 | Watford U23 v Plymouth U23 | L | 1-3 |
| England U23 Development League | 2020/01/10 13:00 | Watford U23 v Coventry U23 | L | 1-2 |