Fikayo Tomori was given a straight red card in the 18th minute for taking down Chelsea player Mason Mount, which reduced AC Milan to 10 men. Jorginho's penalty kick in the 21st minute at San Siro stadium gave Chelsea the lead. In the 34th minute, with Mount's help, Pierre-Emerick Aubameyang extended the advantage with a close-range goal.
With seven points, Chelsea has surged to the top of Group E, while Salzburg is in second place and one point back of the Blues. With four points each, Dinamo Zagreb is last in the group while AC Milan remains in the third. After a heartbreaking loss to Chelsea, Milan coach Stefano Pioli maintained his composure but afterward admitted to reporters: "I definitely don't think the referee has had one of his best days."