The Rossoneri vice-president has slammed the team's trainer in the aftermath of Wednesday evening's humiliating reverse at the hands of the Blancos in New York
Angel Di Maria had opened the scoring for the Spaniards midway through the first half before Robinho restored parity shortly after. However, the Rossoneri fell apart after the interval following a number of substitutions and were eventually beaten heavily.
The club's vice-president was not impressed with Allegri's decision to make nine changes over the course of the fixture, and ignored suggestions that the Blancos also fielded a weakened side at Yankee Stadium.
"Can you believe that? I am really p***ed. You simply cannot make nine changes in a game against Real Madrid," Galliani was quoted as saying by Gazzetta dello Sport.
"The coach has made some serious mistakes and I will tell him just that.
"We are playing in New York in front of 60,000 people and all eyes are on this game.
"I don't care that [Jose] Mourinho made a lot of changes as well. Have you seen Madrid's bench..."
Milan kick off their new Serie A campaign at home to Sampdoria on August 26.