Paul Pogba has allegedly angered the Manchester United coaching staff with his behaviour on the club's team coach.
The relationship between Pogba and Jose Mourinho is said to have weakened in recent days, with the France international being stripped of the vice-captaincy by his manager.
The pair also endured a frosty exchange at the club's training ground on Wednesday, with Mourinho appearing to say something which angered Pogba.
According to the Daily Mail, the recent tension was sparked by Pogba putting on loud music on the team coach in the hours leading up to the fixture with Wolverhampton Wanderers on Saturday afternoon.
The report suggests that Mourinho and his coaching staff wanted the squad to focus their attentions on the Premier League encounter with the newly-promoted outfit.
The match in the North-West ended in a 1-1 draw with Pogba giving away possession in the build-up to Wolves' equaliser.