Luis Suarez's 97th-minute penalty helped Atletico Madrid steal a 2-1 win at 10-man AC Milan.
The hosts were roared into action by a brilliant crowd in an electric San Siro as they enjoyed their first Champions League home game in seven years.
And they were by far the better side as Ante Rebic and Brahim Diaz each went close, before the latter´s brilliant movement in the box created space for Rafael Leao to open the scoring with a rifled effort past Jan Oblak.
Atletico Madrid: Oblak 7, Hermoso 6, Gimenez 7, Felipe 7, Trippier 5, Llorente 6, Kondogbia 6, Koke 6, Carrasco 5, Correa 7, Suarez 8. Subs. De Paul 7, Felix 6, Griezmann 7, Lemar 6, Lodi 7.
19´- WHAT A SAVE! That´s why Oblak is the best! Rebic is played through on goal by a beautiful Diaz ball and he just has the keeper to beat. He goes for the far corner but Oblak makes himself massive and makes the save.
20´- GOAL! AC MILAN 1 ATLETICO MADRID 0 (Leao, 20)! Milan have the breakthrough. It´s wonderful from Diaz inside the 18 yard box who worms away from Koke before teeing up Leoa. The Portuguese has plenty left to do but rifles an effort into the corner beyond Oblak to put his side 1-0 up and send the crowd mental.
29´- RED CARD! All of AC Milan´s good work could be in tatters here! Kessie has received his second yellow card for rash tackle on Llorente and he´s off! What a massive blow. Both cheap and unnecessary fouls and he could have cost his team dearly here.
84´- GOAL! AC MILAN 1 ATLETICO MADRID 1 (Griezmann, 84)! ATLETICO HAVE THE EQUALISER! Lodi´s cross is well met by Griezmann who rifles a brilliant effort past Maignan on the half volley.
90+3´ - PENALTY TO ATLETICO! DRAMA DRAMA DRAMA!
90+7´- GOAL! MILAN 1 ATLETICO 2 (Suarez, 90+7´) Suarez hits the winner!!!!!!! SURELY!