AC Milan have upset Barcelona 2-nil in the first leg of the their round of 16 Champions League tie in Italy.
Kevin-Prince Boateng scored off a hand ball in the 57th minute while Sulley Muntari added the second 10 minutes from time.
Barcelona, runaway leaders in the Spanish league, eliminated Milan last season.
The return leg is at the Nou Camp on March 12th.
Turkish side Galatasaray drew 1-all with German club Schalke in the other match in Istanbul.