Manchester United boss Erik ten Hag was happy for Casemiro after their 1-1 draw at Chelsea.
Casemiro's header in injury-time rescued a point for the visitors.
Ten Hag said, "He is growing from game to game and now, he made the equaliser.
"And that gives the team and him more confidence. We need headers, and it was a great finish. But he is coming in the team and you see how important he is. I think he was massive today in his performance.
"He is now matching the Premier League intensity and from game to game he will be better. I am confident of that."