At Manchester United, Erik ten Hag has already established the rules, dismissing a player for arriving twice late to team meetings.
After a truly terrible season under Ole Gunnar Solskjaer and then Ralf Rangnick last year, the Dutchman was given the reins at Old Trafford this summer and is now trying to turn around the club’s fortunes.
The first stage of that has been introducing strict discipline within the squad ahead of his first season in charge and thus far, it appears that most have brought into the new rules. Having said that, not all have managed to get up to speed yet.