Milan have conceded three goals in the opening two minutes of the derby and will now be forced to start from scratch for the second leg.
After scoring a late equaliser against Roma in last weekend’s Europa League final, Milan now have three wins in four games.
The Nerazzurri have scored four goals in their last four home games and were held to a 2-1 loss at home to Bologna on Wednesday.
“It’s not good news, but we’re just not as strong as we were,” said defender Leonardo Bonucci.
We know what we need to do. “
We’re still going to play at a high level, and we’re going to continue to improve.”
We know what we need to do.
We have to learn to fight.
We’re not going to score the same as the first two goals.
“Atalanta, who have lost all four games in all competitions this season, are unbeaten in their past four home fixtures, and scored in their opening game in the competition.