The Manchester United boss is currently preparing for his third season in charge of the Red Devils as he looks to try and guide his team to a Premier League title challenge.
Manchester United ended up without a trophy last season as they finished in second place in the Premier League table and were beaten by Chelsea FC in the FA Cup final.
Mourinho has been tasked with steering Manchester United to their first Premier League title since Sir Alex Ferguson’s retirement back in 2013.
However, there have been some negative vibes coming out of the Manchester United camp in pre-season, with Mourinho looking increasingly unhappy during his news conferences.
And Sutton feels that the negativity stems from the fact that Mourinho is envious of what Manchester City and Liverpool FC are both building at present.
Speaking in an interview with BBC Sport, Sutton said: “United just seem to be an unhappy camp and it all comes down to the manager.
“I wonder what the owners make of him telling fans not to turn up to their tour games in the United States, plus his criticism of his players and all his comments about needing new players but not getting them – he has basically been telling the centre-halves already at the club that they are hopeless.
“It has resulted in a negative feeling about the club, at a time when almost every other club in the land has an air of positivity going into the new season.
“I think Mourinho’s frustration probably comes from him looking at City and Liverpool, and the way they play, and he is probably jealous. You wonder about the impact it will have on United at the start of the season, and what it means for his own future too.”
Manchester United will kick off the new Premier League season when they host Leicester City at Old Trafford on Friday night.
The Red Devils won both the Europa League and League Cup in Mourinho’s first campaign in charge last term.
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