His beloved formation.
When a coach chose a system over play best players in their right position. For instance I wanna ser how he's gonna play Hazard in Chelsea. Insigne, Candreva, Berardi, Shaarawy best italian attack players are wings and he rather use two strikers in the likes of Pelle and Eder.
As I said, when It works, great. When It doesn't, no plan B