Allegri led Juve to five Serie A titles, five Italian Cups and two Italian Super Cups.
The 24-year-old is looking to give his club career a jump start at Milan after being sold by Chelsea and he was key to Stefano Pioli's side claiming the points in their opening match of the season
AS Roma said on Monday they have sacked chief executive Pietro Berardi, a decision taken days after prosecutors seized documents at the Serie A club as part of a probe into possible financial irregularities in transfer deals.
Serie A title fever is sweeping Naples as the football-mad city hopes that rampant Napoli will end more than three decades of waiting to be crowned kings of Italy.
Inter Milan made it two from two in Serie A with Saturday's comfortable 3-0 win over Spezia on Romelu Lukaku's return to the San Siro.
Angel Di Maria landed in Turin on Thursday night ahead of his move to Juventus after being released by Paris Saint-Germain at the end of last season.
But the most emotional scenes came during Fiorentina's 3-1 defeat at Atalanta, who kept their hopes of Champions League football alive thanks to goals from Josip Ilicic, Alejandro Gomez and Robin Gosens.
Paulo Dybala strikes twice to send Juventus to the top of Serie A with a 2-0 victory over Udinese as title rivals Napoli are held to a goalless draw at Inter Milan.
Napoli pull four points clear at the top of Serie A with a 5-0 hammering of Cagliari a day after champions Juventus' game in Turin was snowed off.
Veteran Italian striker Luca Toni will hang up his boots after a final Serie A game with Verona against Juventus on Sunday.
Dries Mertens treble keeps Maurizio Sarri's men six points behind leaders Juventus
Rafael Benitez says he will be leaving Napoli following the final game of the Italian club's season on Sunday.