Olympiakos beat Milan 3-0 on Thursday in the opening game of the Guinness International Champions Cup friendly tournament, with goals from Alejandro Dominguez, Dimitris Diamantakos and Andreas Bouchalakis.
Dominguez opened the scoring for the Greek side in the 16th minute off a cross from Mathieu Dossevi. Dominguez brought the ball down and sent a right-footed shot past goalkeeper Gabriel.
Diamantakos doubled the lead in the 49th minute, angling in a cross from Arthur Masuaku. Bouchalakis scored in the 78th minute on a long left-footed shot.
The tournament, being played across various North American venues over 12 days, also involves English clubs Liverpool, Manchester City and Manchester United, reigning European champion Real Madrid and Italian clubs Internazionale and Roma.