"He is 21 and to play like that [against Chelsea] and control the game like that is impressive. He will be a big player for Manchester
United.
"I like him because he is a very nice guy and he doesn't have a problem to ask something before the game. I am always there to help him.
"When I came to Manchester, I saw within a few days he would become a top player.
"He is working very hard, but I don't want to say too many things about him because he is still very young.
"But he deserves all the good things."
Matic knows what is needed to play in midfield under
United manager Jose Mourinho, who he worked with at Chelsea before moving to
Old Trafford in the summer.
McTominay and Nemanja Matic during a Manchester
United training session
"To fight for the team and not to let the opponent have big space to play," said the Serbia international.
"And this is what Scott and me did [at the weekend]."