With his future at United appearing uncertain, the Daily Mail have pointed out that some of Pogba's key Premier League stats this season are below that of Philippe Coutinho - despite the fact the Brazilian left Liverpool for Barcelona three months ago.
"The last Premier League was not 20 years ago, it was three years ago".
"The mental level, the day by day, everything must be consistent until the last day so one of the things we have to improve is consistency", he said.
Mourinho continued to point to his own record in the post-match press conference, hinting his side lacked focus and consistency.
Meanwhile, Vincent Kompany barely let City's title celebrations begin before setting his side the challenge of making it two in a row next season. The defeat at Old Trafford helped the Etihad outfit mathematically win the Premier League.
"You win titles with quality of course, without that you have no chance, but you win titles with consistency".
Jay Rodriguez struck the games only goal in the second half, and the Baggies held out for their first away victory since August.
'I saw lots of people on the moon because we won against Manchester City. Everything was complicated. We couldn't think fast, we couldn't play fast.
'City won the title because they won more points than everyone else, not tell City they won title because United did not win, it is not fair on them'. "They were the best team".
"I don't expect you to be man of the match every week, I don't expect you to score two goals every week". We didn't want (to play) or couldn't play simple, everything was slow, one more flick, trick, turn.