Needing to better Roma's result against Catania, Inter were under pressure after their title rivals took an early lead while they struggled to break down Parma.

But Ibrahimovic's goal after 62 minutes regained the initiative and his second after 79 minutes made certain of a third straight league title.

Roma conceded a late equaliser as they drew 1-1 in Sicily.

The results condemned Parma to relegation but saved Catania, who had looked like easing the title the way of Roma when they allowed Mirko Vucinic to give the capital side an eighth-minute lead.

But the Sicilians earned the point which preserved their top flight status thanks to an 85th-minute goal from Jorge Martinez.