United is getting the best out of Paul Pogba.
"So, I think you look at football in a very pragmatic way, normally you get what you deserve, so if we want to win against a good team against Tottenham, we can not make mistakes".
Martial, who is at risk of being dropped by Mourinho for the visit of Tottenham tomorrow, is understood to have been encouraged by the club's stance, despite originally asking to leave Old Trafford in June.
United already trail title favourites Manchester City, Liverpool and Chelsea by three points after a terrible display in losing 3-2 to Brighton last weekend and that gap could have doubled by kick-off at Old Trafford (1900GMT) with all three expected to win again this weekend.
When quizzed about a rumoured falling out with United chief executive Woodward, Mourinho said he had not followed the media coverage. "Against Leicester we didn't make mistakes, we played well, we won".
One of the numerous confusions going on at Old Trafford is about France worldwide and Manchester United Forward, Anthony Martial.
"Paul said it, he has to answer for his words", Mourinho said.
"I don't know what Man United are about any more".
Although the Premier League season is only entering its third round of matches this weekend, Jose Mourinho is already displaying strains of dissatisfaction with life at Manchester United. 'But from a human point of view, I think it was a great experience.
"You have to play against 19 opponents at Old Trafford and away, you have to play against everyone, I don't know if it's the right time".
Serbian midfielder Nemanja Matic and Ecuadorean full back Antonio Valencia have yet to play this season while Chilean forward Alexis Sanchez missed Sunday's loss at Brighton & Hove Albion.