Shame we couldn't replace BBC with other Italians e.g. Caldara but MDL, Demiral and Romero are the CBs of the future. I'm hoping for another back three honestly....
MDL - Bonucci - Chiellini. I feel like Bonucci and Chiellini are at their best in a back three. If MDL can play sweeper as well as Bonucci and Demiral is good enough to start then he can be my guest but Bonucci at his best is a great asset and he would suit Sarri's football no doubt.