Bayer Leverkusen's German league and Cup double was the result of players keeping faith in the team throughout what turned into a dream season, their coach Xabi Alonso said on Saturday.

Bundesliga leaders Bayer Leverkusen overwhelmed second division club Fortuna Dusseldorf 4-0 on Wednesday to reach the German Cup final and stretch their unbeaten run to 40 matches across all competitions this season.

Champions Bayern Munich beat RB Leipzig 3-0 on Saturday thanks to two goals from Robert Lewandowski to win their 19th German Cup and complete a domestic league and Cup double.

Bayern Munich, Paris Saint Germain and Juventus retained doubles by lifting domestic cup titles on a busy night of football around Europe.

A 20th-minute goal from Gonzalo Castro and two late goals from Marco Reus and Henrikh Mkhitaryan propelled Dortmund into their third successive Cup final.

The Germany international scored in each half as the Bundesliga leaders beat Werder Bremen 2-0 in DFB Pokal semifinal on Tuesday.