Manchester United boss Erik ten Hag is happy seeing his players row with eachother on the pitch.
Senior pair Bruno Fernandes and Casemiro were seen in an animated exchange at the end of victory over Aston Villa.
Ten Hag said, "Yes, of course [I encourage them].
"They have to communicate. That have to organise it and make sure we get a win.
"So when they are talking to each other, in discussion, debating with each other, I don't have a problem with that.
"It showed willingness and showed ambition from this team."