Robert Lewandowski passed the 50-goal mark this season as Bayern Munich completed the double with a 4-2 victory over Bayer Leverkusen to win a 20th German Cup on Saturday. Bundesliga champions Bayern dominated at the Olympic Stadium as David Alaba smashed home an early free-kick before Serge Gnabry added their second goal in the first-half. Lewandowski has 51 goals in total this season after scoring twice in the second-half either side of a Sven Bender header for Leverkusen. Kai Havertz converted a penalty deep into added time for Leverkusen. ryj/dj