The former Southampton player has endured a tumultuous relationship with Mourinho since the Portuguese’s appointment back in 2016 but Shaw’s United career appeared to have turned a corner in recent weeks, with news that the 22-year-old was set to be offered a new contract.
However, his relationship with Mourinho appears to have hit an all-time low following United’s FA Cup quarter-final 2-0 win against Brighton, when the United boss offered a scathing appraisal of his left-back’s performance.
"Luke, in the first half, every time they came in his corridor, the cross came in and a dangerous situation was coming," Mourinho said.
Man Utd to make Pogba the Premier League's highest-paid player - Paper Round
"I was not happy with his performance."
Shaw was substituted at half-time with Mourinho justifying the decision by saying: "At least Antonio [Valencia] defensively was capable of good positioning."
The latest public barraging of Shaw has left the left-back angry, reports the BBC’s Simon Stone, while several newspapers claim that Shaw could now leave United such has been the deterioration of relations with Mourinho.
However, the Telegraph go a step further, reporting that some United players have concerns that Shaw is being "bullied".
“It is understood that some United stars even believe Shaw is being “bullied” by his manager and the defender is facing an increasingly bleak future while Mourinho remains in charge,” write John Percy and Ian Whittell.
The defender, who moved to United in a deal reportedly worth £30m in 2014, has just over a year left on his contract.
Opinion: Bale may have to consider his future for club and country
'He will score goals' - Trippier defends Kane