 The first stage involves 12 clubs in a series of two-legged knockout ties. The six survivors join 26 clubs in the second stage, in which they are divided into eight groups of four. The teams in each group play in a double round-robin format, with each team playing home and away games against every other team in their group. The top two teams from each group are then drawn into the knockout stage, which consists of two-legged knockout ties. From that point, the competition proceeds with two-legged knockout ties to quarterfinals, semifinals, and the finals. Between 1960 and 1987 the previous winners did not enter the competition until the semifinal stage, making it much easier to retain the cup.
