Roy Keane has criticised two Manchester United players, aside from Casemiro, for their role in Liverpool's goals in their 3-0 defeat on Sunday.
Casemiro made errors prior to two goals in the 3-0 defeat, misplacing a pass ahead of Liverpool's first before being robbed by Luis Diaz in the move that led to the second. Diaz scored both goals.
The Brazilian was substituted at half-time by manager Erik ten Hag and replaced by young midfielder Toby Collyer. The 20-year-old was making his Premier League debut.
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Casemiro's wife has since responded to criticism that the five-time Champions League winner has received, sending a photo of the midfielder's extensive trophy haul to her followers on Instagram.
But Keane believes that Casemiro was not the only player at fault in the lead-up to Liverpool's first goals, and called out two other United players for the roles that they played.
The United legend believed that full-backs Diogo Dalot and Noussair Mazraoui - who was playing in his first Northwest derby - were also at fault due to their positioning.
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He fumed: "Mistake from Casemiro here, for all his experience. That is not a first time pass [in the lead-up to the first goal]. It's not worth the risk.
"And when they lose it, they are all over the place. They've done this for the last couple of games and got away with it.
"Look at your right-back. Where is your right-back? Where is your left-back? You're not in control.
"You can't give the ball away that cheaply, and it's happened a number of times. At this level, it's brutal."
Liverpool boss Arne Slot, meanwhile, brutally dissected how his team managed to open up United on several occasions to score their three goals.
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He told Sky Sports: "Their full-backs, nine out of 10 times, are really high, and then Casemiro comes in between them.
"So, if you pick up the ball and you can keep Diaz and Mo Salah high, then you're constantly in a one-on-one situation.
"Then you need midfielders that can run, and we had three of them today that kept running. If they arrive in a duel, they aggressive enough to win it.
"That was, I think, one of the main reasons why we could win today."
Topics: Roy Keane, Manchester United, Football, Premier League, Liverpool, Casemiro