In the seventh minute, Milan was careless in the defense and Tom Rogic was able to shoot in 1-0.
Seven minutes later, Odsonne Edouard was released and he could easily lift in 2-0.
A tough uphill who misses Zlatan Ibrahimovic, who is injured.
But Milan stood up - with a message.
Two goals in two minutes
After 24 minutes, Hakan Calhanoglu sent a free kick in high over the penalty box.
In the 26th minute, Samu Castillejo pushed in 2-2 from close range.
Then the Norwegian Jens Petter Hauge stepped forward and decided the match.
Nice solo goal
Five minutes into the second half, he came in from the left wing.
He dribbled through the Celtics defense and shot in 3-2.
With ten minutes left of the match, Hauge offered a nice assist to Brahim Diaz who from close range scored 4-2.
Milan are second in their group and are ready for the playoffs in the Europa League.
Little tops the group.
One match remains.