Bayern Munich manager Julian Naglesmann once said that "30% of coaching is tactics, 70% social competence". That social competence can easily be applied to handling a dressing room of egos and different personalities who all want to play consistently.
That battle is very real and very defining for any coach at this level with the sheer numbers in some squads. And whilst Chelsea's new head coach Graham Potter will have to prove he is capable of handling a group of established superstars in an intensely scrutinised environment, how his social competence handles the culture at Stamford Bridge will be informative.
Potter is a massive switch for Chelsea's new ownership to appoint. In relation to the regime they have just replaced, appointing the Brighton head coach was certainly not something Roman Abramovich nor Marina Granvoskaia would have done without extenuating circumstances.