The defending champions were beneficiary from several controversial penalties in the past weeks that helped them overcome some tough encounters.

"We're always hearing this story about referees helping us. I don't understand it," the Swedish striker said.

“I have been fighting with them since I arrived in Italy. They often blowing their whistles at me, and it happened tonight. I don't understand. The only thing me and the team can do is win, and this is what we are doing," added the Serie A top scorer.

Manager Roberto Mancini admitted that the winner against Catania was offside but it was a very hard call.

The victory against Catania leaves them with an eight-point lead on top of the Serie A table.