Milan fumbled an early lead for a shock 2-1 defeat to relegation battlers Atalanta, including a Mauricio Pinilla overhead kick.
The Rossoneri missed Keisuke Honda, Juraj Kucka, Alex and M’Baye Niang, so Mattia De Sciglio was used at right midfield. The hosts finally got their first win of 2016, but remained in the damger zone.
Milan wore black armbands and there was a minute’s silence before kick-off after club and Italy legend Cesare Maldini’s death at the age of 84.
The deadlock was broken within five minutes, as Guglielmo Stendardo foolishly fingertipped the ball off Cristian Zapata’s thigh as he was trying to control. Luiz Adriano blasted in the penalty to put Milan in front.
Atalanta immediately threatened an equaliser, but Ignazio Abate got the slightest deflection to send a Papu Gomez free header inches wide.
The hosts were impressive, as Gomez went through the entire defence, combining with Diamanti and Jasmin Kurtic, only for a Luca Antonelli deflection.
From that corner, Andrea Masiello knocked the cross down for a magnificent Mauricio Pinilla overhead kick into the near top corner. Gigio Donnarumma simply had no chance.
More bad news for Milan, as Andrea Bertolacci was booked and will be suspended against Juventus.
Atalanta seemed more likely to score after the break and turned the game around completely when Kurtic knocked down a cross for the Marten de Roon slide-rule pass, Gomez given too much time and space to fire in from 12 yards.
Milan went close to an equaliser twice, as first Mario Balotelli’s fierce free kick was palmed round the post, then on the corner Luca Cigarini needed a goal-line clearance to deny Jeremy Menez.
Diamanti’s curler was plucked out of the air by Donnarumma and Cristian Zapata came sliding in at the back post a second too late to meet Balotelli’s free kick.
Atalanta almost added another on the counter in stoppages, Donnarumma decisive on D’Alessandro.