Bayer 04 Leverkusen, officially known as Bayer 04 Leverkusen Fußball GmbH and commonly known as Bayer Leverkusen or simply Leverkusen, is a German professional football club based in Leverkusen, North Rhine-Westphalia. From Wikipedia
Unbeaten under Niko Kovač, Dortmund face a midweek Champions League test with Guirassy's thigh to be assessed.
