Sunday's humiliating defeat to Chelsea has undoubtedly put Manchester United boss Jose Mourinho under pressure.
Not just the surprising 4-0 scoreline but the manner in the way his stars folded against his former team would have set a few alarm bells ringing amongst the supporters.
After three difficult years at Old Trafford since Sir Alex Ferguson's retirement, Mourinho's appointment had brought fresh optimism back to the club - emphasised further by the big summer signings of Paul Pogba and Zlatan Ibrahimovic.
But they have been sent crashing back down to earth after just one Premier League win in six matches and if a report published in The Times today is to be believed, not all is well at Carrington.
They have claimed that some of Man United's stars have been left 'stunned' by the Portuguese manager's approach and style - particularly in training.
A source close to a senior player has revealed that Mourinho frequently disappears to his office or simply watches from a distance to allow assistant Rui Faria to lead the sessions.
In fact, many of the team are also disappointed with how cold the ex-Real Madrid boss has been in one-to-one situations and feel they would benefit from having a much closer relationship with Mourinho.
At Chelsea, Mourinho would be much more hands-on during training, however, that might explain his change of tact in Manchester.
The very public fallout with Stamford Bridge's big stars was one of the factors behind the Blues' terrible title defence during the 2015/16 campaign and Mourinho's eventual sacking.
So a reluctance to see a repeat scenario occur at his current club may explain why the Man United manager has taken a step back from his usual style.
Sunday's result means the EFL Cup tie against Manchester City on Wednesday has taken even greater significance and, regardless of the team picked to play, another bad loss would dent confidence within the squad even further.