Manchester United manager Erik ten Hag was not happy with the VAR after Casemiro was sent off against Crystal Palace on Saturday evening.
The Brazilian picked up his first red card in English football after he was spotted putting his hands around the neck of Palace's Will Hughes.
Casemiro's incident came as a result of a big brawl on the touchline where a number of players had to be separated.
Read: Fernandes Rashford fire Man Utd past Palace
Ten Hag took issue with the fact that Casemiro was the only player picked out of the big melee, even though replays showed Jordan Ayew in a similar situation with Fred.
"I see two teams fighting each other," said Ten Hag, as per BBC Sport.
"I see two teams where several players crossed the line and one player is picked out and gets sent off. For me that's not right.
"When you freeze, Casemiro has crossed the line. But many more players are crossing the line.
"It's about consistency. You don't want to lose players when colleagues are hurting each other that bad like the player did last week against Christian Eriksen. The player from Crystal Palace started this.
"Casemiro is protecting our player and also protecting the player who wants to attack. He is holding him back - he is protecting him, he doesn't want to hurt the player."
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