David Luiz was left out of the Chelsea squad that beat Manchester United 1-0 on Sunday following a bust-up with Antonio Conte earlier last week. The Brazil international is said to have questioned the manager’s tactics in the 3-0 loss to Roma on Tuesday night and was subsequently dropped. However, the Champions League defeat is reportedly not the route cause of their feud which is said to date back to September. A source told the London Evening Standard the pair have not seen eye-to-eye since the first few weeks of the season.