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.

First-half goals from Jeremie Frimpong, Amine Adli and Florian Wirtz put the game to bed as Dusseldorf struggled to cope with the hosts' pace.

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Germany international Wirtz added a fourth with a penalty on the hour to give Xabi Alonso's team a shot at winning a major trophy for the first time in 31 years.

Leverkusen will face Kaiserslautern, who ousted third division Saarbrucken 2-0 on Tuesday, in the final.