Manchester United manager Ole Gunnar Solskjaer has reportedly introduced a stricter dress code at Old Trafford.
The Norwegian is understood to be unhappy that some of his players are wearing hats and other accessories supplied by their sponsors on match days.
According to The Times, Solskjaer has ordered players to wear their club suits in an attempt to restore discipline at the club.
The Red Devils are currently ninth place in the Premier League table 22 points behind the leaders Liverpool and only six points above the drop zone.
Solskjaer faces a difficult week with Premier League fixtures against Tottenham Hotspur on Wednesday and a trip to the Etihad for the Manchester derby on Saturday.