The Rossoneri played most of the second half with one man less after Mark van Bommelwas sent off in his second appearance for the club, but they still managed to win with goals from Robinho in the 58th minute and Zlatan Ibrahimovic five minutes from the end.

Catania spent much of the second period camped in the Milan half, but there was no way through as the league leaders displayed why they are at the top of the table with a resolute victory.

Libor Kozak inspired Lazio to victory over Fiorentina to move the Biancoceleste up to second.

The Czech striker scored two goals in four second-half minutes to earn Eduardo Reja's side only their second win of 2011 and lift them above Napoli into second place, setting up a mouth-watering clash with leaders AC Milan on Tuesday.

Without the suspended Mauro Zarate, it was up to Kozak to lead Lazio's assault on three points and he rose to the occasion.