Clarence Seedorf, Gennaro Gattuso and Alessandro Nesta are all in a race against time to be fit for Milan's Champions League tie against Spurs.
The three wounded stars all underwent tests today after they picked up various injuries over the weekend.
Seedorf limped out of training on Saturday with a thigh problem, the same injury sustained by Gattuso in the warm-up ahead of last night's 2-0 win over Cesena. They will be out for three weeks.
Meanwhile, Nesta had to be replaced during the match after he dislocated his shoulder which could see him sidelined for a month.
"In agreement with the player, it has been decided to try an aggressive recovery programme to allow Nesta's return to action in around three to four weeks," a club statement said.
"Surgery will be undertaken, if necessary, at the end of the season."
Kevin-Prince Boateng, Andrea Pirlo and Gianluca Zambrotta are also presently in the Rossoneri treatment room.
Allegri will be hoping to recover some of his midfield options as soon as possible after he was forced to play defender Thiago Silva in midfield last night.
Milan play Tottenham at the Stadio Meazza on February 15 in the first leg of their tie. The return is scheduled for March 9.