Milan suffered their second successive home league defeat yesterday evening when they went down 1-0 to Atalanta.
On the first day, they had been defeated at San Siro by newly promoted Sampdoria with the same scoreline.
Cigarini was Atalanta’s hero yesterday. He scored the winner on the 64th minute, beating goalkeeper Abbiati with a low shot from the edge of the area.
Meanwhile, Cagliari scored a late equaliser in a 1-1 draw at Palermo in another match played earlier.
Uruguayan midfielder Egidio Arevalo Rios put Palermo ahead with a shot from the edge of the area in the 40th minute and Marco Sau replied in the 88th with a close-range header from a rebound in his Serie A debut.