AC Milan coach Massimiliano Allegri told his team to roll up their sleeves following their shock 2-0 defeat at minnows Cesena.
Having signed global stars Zlatan Ibrahimovic and Robinho since their opening game of the season - a 4-0 hammering of newboys Lecce - Milan were expected to deal a footballing lesson to little Cesena, who two years ago were playing in the Italian third tier.
But goals from Albania striker Erjon Bogdani and Emanuele Giaccherini in the first half stunned Milan. And Allegri said his team, particularly his forwards, need to do more to work for the team.
"They need to have a completely different attitude. We need sacrifice, especially when you go behind," he said. "When you don't have the ball, everyone has to get back but we didn't get that."
However, Allegri, who spent the previous two years as Cagliari coach, was looking to the positives. "It's a defeat that will do us some good because matches are also won with sacrifice. If we don't play as a team we won't win important things."
Milan started the match reasonably well but were knocked back as Giaccherini sent a ball from left to right where Luca Ceccarelli brought it down on his chest and volleyed across goal for Bogdani to glance home a header.
As Milan pushed forward they were caught again a minute before the break, Stephen Appiah's clearing header finding Bogdani, who rolled marker Sokratis Papastathopoulos and released Giaccherini, who scampered in on goal and beat Cristian Abbiati with a crisp shot.
Allegri introduced Robinho for Ronaldinho in the second half but he had no more influence than Ibrahimovic.
Substitute Filippo Inzaghi earned a late penalty for Milan but Ibrahimovic's debut to forget ended with him crashing the spot-kick against the post.