Casemiro scored a goal and was given a red card before halftime of the 2-1 victory at Old Trafford.
Amorim commented that Casemiro's level of performance is due in part to his high expectations, given his experience in big games.
Amorim also noted that Casemiro's aggressive play is a result of his strong desire to win and gain possession of the ball.
The manager acknowledged that while Casemiro's actions were not ideal, the team's overall performance demonstrated their strong team effort and determination to win.
Amorim emphasized that the team's success is not dependent on any one individual play, but rather on their collective ability to work together and press the opponent.