Casemiro doubled his Manchester United goal tally with a brace in the Red Devils 3-1 win over Reading.
The Brazilian received assists from compatriots Antony and Fred to give United a lead, before Fred added a third and the Royals scored a late consolation.
The former Real Madrid star helped United record an 11th successive home win, to reach the FA Cup fifth round.
While teammate Christian Eriksen sustained an injury, Casemiro is going strong and United need him to continue in this kind of form.
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Reaction to Casemiro performance
Manchester United manager Erik ten Hag was mightily impressed with the midfielder and spoke about the talent he brings to the side.
He also explained how he uses him differently to his more defensive role at Madrid, and trusts him to drive United forward.
Ten Hag told the club website: “We know he’s a great player and that midfield at Real Madrid, with Kroos and Modric, it was great. He’s capable of that [scoring goals]. We see him as a part of it offensively and he enjoys it as well, when he can come [into] it.
“What I like is dynamic football with variations, with many positional switches so we have to make the opponent think so that we can take the benefit of it. Casemiro is magnificent.
“In front of the back line, always taking good positions, in and out of position. And he can deal with the ball, he can give the right pass. So, he can accelerate the game and if necessary, he can score.”
Casemiro’s goals were very well taken, with the midfielder chipping the Reading goalkeeper after a through ball from Antony, and then curling in an effort from outside the box.
His teammates were also impressed, responding to his post-game Instagram message. Lisandro Martinez was among them. A spectator on the night, he expressed how it was a pleasure to be part of the same team as the midfielder.
Casemiro has exceeded expectations at Manchester United so far. When he joined, fans believed it was simply too good to be true, that there must be a catch.
The fear was that he would go the way of other big name signings in the post-Fergie era, who have failed to live up to their ability.
Instead Casemiro is showing he is even better than anybody gave him credit for, stepping out of the shadow of Toni Kroos and Luka Modric.
He is the main man at Manchester United, and is thriving under the added pressure and attention.