Bayer Leverkusen will not forget about the eight horrible minutes they had against Bayern Munich. Gerardo Seoane's side saw how his team went from 0-1 to 0-5 down in the blink of an eye.
Lewandowski scored in the 3rd minute, but after 30 minutes, the floodgates opened.
Robert Lewandowski got his second of the game, just on the half-hour at the BayArena.
Bayer Leverkusen were suffering and they were unlucky that Sule's saveable shot was inadvertently deflected by Thomas Muller's thigh past Hradecky.
It was too big a blow for Leverkusen who lost the ball from the kick off and Gnabry scored after being played in by Muller.
Then, Gnabry scored again just a minute after his first goal to make it 0-5 before half-time. Four goals in eight minutes.