Manchester United made it two wins from two under interim manager Ole Gunnar Solskjaer with a 3-1 victory over Huddersfield.
Paul Pogba scored twice and Matic bagged the other as United romped past the Terriers.
It comes just over a week after Mourinho was sacked as manager of the Old Trafford club.
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An air of positivity has emerged since Solskjaer’s appointment.
And Matic reckons the team are getting the fans back onside.
“After Cardiff, we gained more confidence,” he said.
“It was important to win at our stadium, to bring a smile on the face of our supporters.
“We made some mistakes. We need to see what we can do better.
“It’s a completely different atmosphere when you win games.
“This club doesn’t accept drawing or losing a game.
“This is the way we have to try to win the next one.
“It’s always important to score early if possible.
“After that we have more space to play. I’m happy with my goal.”
Manchester United’s result aids their top-four hopes, with the club still plenty of points off the Champions League places.
They next play Bournemouth before a trip to Newcastle on January 2.
Solskjaer has agreed to manage the club until the end of the season, where he will then head back to Molde.