i'm not an ancelotti fan, i think there's a good reason why he failed to win the league with juve. i'd never want him back. but he was pretty good in cup competitions, and invited the modern diamond midfield, the one sarri is trying to make tick at juve. now sarri probably has fresher ideas and more eager to win, but looking at their career, the comparison doesn't make sense. ancelotti is one of the all-time great coaches, while sarri is at the moment on the same self as marini, probably the only other coach who only won a single uefa cup/el in his career. let's hope sarri will start to catch up on ancelotti asap.