#3. Massimiliano Allegri (2014 - present) :
After proving his worth with Milan, Allegri's arrival in Turin garnered mixed response from fans. When it comes to building teams, Allegri's arrival did not please everyone. But looking at the past few seasons, he shut his critics up by winning. After all, the primary focus of a professional manager is to win, not to please.
Inheriting an already powerful squad from his predecessor- Antonio Conte, Allegri took his time to mold the team to master his tactics and methods. But the massive success and landmarks which followed really shows why he earned his name on the list.
Allegri took Juventus to unprecedented success in Italy as he led his side to three successive domestic doubles, a feat which will rarely be matched in the future. The master tactician helped Juventus towards more European glory but unfortunately lost two UEFA Champions League finals to Barcelona and Real Madrid in these past few seasons.
Massimiliano Allegri is still a massive part of the current Juventus squad and with the arrival of a player like Cristiano Ronaldo, they are enjoying their best start in history. There is no doubt whatever happens Allegri will be remembered forever by the club and the fans due to his crucial impact.