The Red Devils made it back-to-back 2-2 draws either side of Christmas this afternoon, coming from two goals down to rescue a point against Burnley, having conceded a late equaliser against Leicester City on Saturday.
Mourinho insists that he has no problems with the performances of his players, but did concede that his side have been letting in too many easy goals of late.
"Another 's' goal. I don't need to say the other letters of the word. That is what we are having now, lots of 's' goals against so that has an impact in the game," he told reporters.
"The boys do what they can. They are trying hard with the problems we have, with the injuries we have.
"I am not happy with the result, I was not happy with the result against Leicester, but I am happy with my players. No critics to my players."
The draw means that United could go into their final game of 2017 sitting 15 points adrift of Premier League leaders Manchester City.