It's safe to say that Milan have now hit rock bottom. After being relegated to 10 men early in the match, Milan failed to bounce back. Goalkeeper Christian Abbiati received a red card and forced the opening penalty.
Milan have now lost four matches in a row in all competitions, and they are now in the second half of the table, looking at the nearly impossible task of making a push for Europe.
Parma's 4-2 win at the San Siro means they have now gone 16 matches undefeated in Serie A, an astonishing record for Roberto Donadoni's men, who are in European contention.
Here are five things we learned from this Italian fixture.