Milan make easy work of Palermo
Milan coach Massimiliano Allegri hailed the victory: "I think everyone played well. It was only at the beginning that we didn't manage to stretch the game as we subsequently did."
"For us, regardless of the results of others, which we're happy about, it was important to get back to winning ways in a convincing way because we need to claw back the points we lost earlier this season.
"This allows us to climb up the table given that it's a long season. We're finding good physical condition and that's going to help us in this intense month.
"Tonight everyone knew how important the match was. We were tired in Turin [where they lost 2-0 to Juventus two weeks ago] but we also played badly tactically and were too chaotic at the back and we didn't do enough with our quality."
Milan came into the match with just five points from their opening five league matches, the worst start to a season by a defending champion in 21 years.
Tzorvas then needed all his agility to keep Robinho at bay after 38 minutes, parrying an initial shot straight back to the Brazilian before somehow getting down low to deflect the follow-up effort round the post.
Nocerino on target
But the deadlock was broken two minutes later. Ibrahimovic's cross to the back post was headed on by Alberto Aquilani to Nocerino, whose diving header from close range found the target.
Ibrahimovic was also the provider for Milan's second goal after 57 minutes, delivering a great ball into the area for Robinho to plant a shot beyond the reach of Tzorvas.
Sweden international Ibrahimovic could have added another five minutes later, but turned Cassano's cross narrowly over the crossbar. But Cassano did better moments later, firing a pass from Ignazio Abate into the bottom right corner from ten yards out.
Palermo had not had a look-in all match, and they continued to feel the pressure until the final whistle, with Tzorvas sparing further blushes thanks to two great saves to keep out Aquilani and Ibrahimovic.