Newcastle were awarded a penalty for a handball VAR in injury-time against Spurs on Sunday.
Callum Wilson stepped up to make the game level at 1-1, with Mourinho storming down the dugout after the final whistle.
And speaking after the game, Mourinho pointed out that United were awarded a penalty by VAR after the final whistle went in their last-gasp victory over Brighton.
He told reporters: "The only thing that I know is that I'm more experienced than him and I left down the tunnel when the referee blew the whistle for the last time.
"I know that in some matches at some clubs, even after the last whistle, it's possible for something important to happen, but for us I knew that after the last whistle it was over for us and I left for the dressing room.
"So Nuno a little bit more naive than me and he stay there."