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.
Dries Mertens scored four goals, including a nine-minute first-half hat-trick, as Napoli forgot their scoring problems with a 5-3 win over Torino in Serie A on Sunday.
Gonzalo Higuain struck again with a trademark goal to give Serie A leaders Juventus a 1-0 win over AS Roma in a tense top-of-the-table match which put them seven points clear on Saturday.
Dries Mertens scored a hattrick to lead revitalised Napoli to a 5-0 rout at leaky Cagliari in Serie A on Sunday.
Lazio beat Sampdoria 2-1 on Saturday with Felipe Anderson setting up both their goals as they rebounded from last week's derby defeat to AS Roma to climb up to fourth in Serie A.
Inter Milan scored three early goals before surviving a second-half fightback to beat 10-man Fiorentina 4-2 and give new coach Stefano Pioli his first win on Monday.
Gianluca Lapadula scored his first Serie A brace to help AC Milan thump Empoli 4-1 away on Saturday while Chievo were left fuming after their 2-1 defeat at Torino.
Nikola Ninkovic, Leonardo Pavoletti and a Juraj Kucka own goal ended 10-man AC Milan's chances of going top of Serie A after crashing 3-0 to Genoa on Tuesday.
Juventus defender Daniele Rugani and midfielder Kwadwo Asamoah are expected to be out of action for more than seven weeks
Champions Juventus returned to the top of Serie A with a 4-0 home rout of Cagliari on Wednesday, while former leaders Napoli dropped to second after being held to a goalless draw at Genoa.
Carlos Bacca scored for the second game in a row and M'Baye Niang netted from the penalty spot in a disjointed performance