Nocerino drove the Rossoneri in front with a low shot through a crowded penalty area nine minutes into the second half. Ibrahimović confirmed victory with a powerfully-struck penalty, awarded after goalkeeper Željko Brkić brought down Kevin-Prince Boateng.
Massimiliano Allegri’s men are a point clear of Juventus and Udinese, who play Novara and Lazio respectively on Sunday. Chievo picked up their first victory in four games beating Cagliari 2-0 thanks to goals from Cyril Théréau and Gennaro Sardo.
There was an eventful ending to the day’s other game, a 2-2 draw between Fiorentina and Atalanta. Having equalised in the 81st minute, the visitors then took a 2-1 lead courtesy of Germán Denis’s league-leading 11th goal of the campaign, only for Stevan Jovetić to earn the Viola point.