The Bianconeri were beaten 5-0 by Lazio in the second leg of the DFB Pokal in Italy.
The Biancocelesti had been trailing by two goals when a first half goal from Mario Balotelli gave them a 2-1 lead.
But the home side’s performance was poor from the beginning, with the home team unable to get going in the first half.
The hosts managed just five shots in the opening 45 minutes, and their keeper, Alessandro Del Piero, was booked three times.
As the game progressed, it became increasingly obvious that the hosts lacked any form of structure and organisation.
Balotellini, who has scored five goals in his last six Serie A games, was sent off for a first-half tackle on Mario Pasalic and was shown a straight red card for a second offence.
The Lazio striker, who scored a hat-trick against Udinese last season, was also dismissed for a foul on Gianluigi Buffon in the penalty area.
At this point, Balotella was shown the red card.
The referee, Piero Flegrini, said that it was clear that the goal was given for a challenge on a Lazio player and that Balotini had “intentionally” taken the ball away from Buffon.
“I didn’t like the fact that Balots penalty was given,” Flegrrini said.
“The referee did not give it because Balots intent was clear.
That’s what I thought.”
At the end of the first-leg, Balots side went up 4-1 thanks to a goal from Pasalico.
The home side was then punished for a lack of discipline in the last stages of the game.
The last-minute equaliser for the visitors came when Domenico Berardi hit the post from outside the penalty box.
The visitors were able to secure a point despite the dismissal of Balotello.
Flegrs decision to award a penalty was controversial and he was criticised by several of his players.
“He [Berardi] was sent for that.
I don’t understand why he was sent,” goalkeeper Gianlui Donnarumma said.
The game was also marred by a late collision between Italian international Alessandro Di Canio and the home defender.
“That is not a game of balls, but of men,” the defender said.