Jose Mourinho's treatment of Luke Shaw would give grounds to constructive dismissal if it took place in any other industry, according to a source close to the Manchester United left back.
Shaw, 22, has struggled for game time under United manager Mourinho, with the pair having a frosty relationship.
This reared its head again on Saturday when Mourinho questioned Shaw's attitude after substituting him at half-time in United's FA Cup win over Brighton, prompting anger from the defender's camp.
Sky Sports reporter Kaveh Solhekol tweeted that a source close to Shaw had said: 'Mourinho's treatment of Luke is an absolute disgrace.