Erik ten Hag has invited his Manchester United squad to "criticize each other" after their 6-3 loss to Manchester City.
Ten Hag branded the result as a "hammering" and put the performance down to a lack of belief among his players.
"It's an open door," Ten Hag said. "This performance is unacceptable. As a team and as individuals we will criticise each other and then we will learn the lessons and we have to do better, starting the next game."