Ruben Amorim has admitted that one Manchester United star is "suffering" despite his side's victory over Chelsea on Saturday.
The game exploded into life just five minutes in when Blues goalkeeper Robert Sanchez was dismissed after his late clattering challenge on Bryan Mbeumo, and it had catastrophic repercussions for the visitors.
Chelsea boss Enzo Maresca made three first-half substitutions that United capitalised on to devastating effect, with both Bruno Fernandes and Casemiro getting on the scoresheet for the Red Devils.
The former marked his 200th Premier League appearance with his 100th goal for the club, whereas the latter would not even see out the half.
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Casemiro's game ended early, just moments before the half-time whistle, after he pulled back Chelsea substitute Andrey Santos, having already been cautioned earlier in the match.
And Amorim has admitted that Casmiro is frustrated by his dismissal, with the boss adding that his experience should have warned him against going in for a challenge while on a yellow card.
Ruben Amorim has won just nine Premier League games in charge of Manchester United | REUTERS"He's [feeling] worse than me," Amorim told BBC Sport. "We won so I will forget a little bit and he will suffer because he's a top professional.
"He understands what he did. He is experienced enough that that play should not be played like that. He cares too much."
The red card spurred on Chelsea, who were vastly improved in the second half, with the Blues netting one towards the end through Trevoh Chalobah.
ANALYSIS: Three things we learnt as Man Utd beat Chelsea after Robert Sanchez and Casemiro see red
Trevoh Chalobah grabbed a goal to give the visitor's hope of an unlikely point | REUTERSBut United would see out the victory, marking their second consecutive home win and lifting the pressure somewhat on the under-fire boss, who was keen to rally the troops and focus on winning their next fixture.
"Every win, especially in this moment, is important, against a great opponent," Amorim continued.
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"We started the game in the right way. Really aggressive. The red card helped us dominate the game, but we were already there.
"We scored two goals and then we tried to complicate our game again. It's always complicated with us. It should have been different this game.
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Bruno Fernandes and Casemiro put Manchester United two goals ahead after Robert Sanchez's red card | REUTERS"We suffered in the end, but we deserved the win.
"Our crowd, our fans, are easy to please. If you give everything, they will be there. That is something our players need to understand. To have the crowd with us, we just need to run, to fight and tackle.
"With this win, we have to forget the good feeling of winning the game and get back to the urgency of feeling we need to win the next game."
United travel to Brentford on Saturday, as they look to build on their victory that sees them move up to tenth in the league.
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