The Rossoneri boss is reeling following the sale of his two best players, Zlatan Ibrahimovic and Thiago Silva, to Qatari-owned Ligue 1 outfit Paris Saint-Germain
Following the expected departure of a number of Rossoneri legends, including Alessandro Nesta, Filippo Inzhaghi and Gennaro Gattuso, the San Siro giants have now lost star duo Zlatan Ibrahimovic and Thiago Silva to Paris Saint-Germain.
Allegri can appreciate why cash-strapped Milan had to offload their two most prized assets, given the money on offer, but he points out that that will not make the rebuilding job any easier.
"Ibra and Thiago Silva? I'm not the one who hires and fires, but we could not say no to PSG," Allegri told Sky Sport Italia.
"But we are at year zero. Twelve champions have left, most due to their age but two because of choices made by the club.
"Even if there are many others who have remained, we must now work from scratch."
However, Allegri is at least buoyed by the fact that Milan still have time to replace those who have moved on.
"There is a month left until the close of the transfer market," he added. "I remember the arrival of Robinho two days before the end of a previous window that changed the face of the team."
Allegri led Milan to the title in his first year at San Siro but the Rossoneri were dethroned by Juventus in 2011-12.