The competition consisted of two stages, the Group Stage and the Elimination Rounds. The Group Stage consisted of three groups with five teams each. Every team played two games (once "home" and once "away") against every other team of its group. The top two teams from each group, as well as the two best third-placed teams, qualified for the Elimination Rounds. The Elimination Rounds was a single-game elimination tournament. Games in the Elimination Rounds were decided by extra time and, if necessary, a penalty shootout.