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Bayer Leverkusen's blueprint for taking on the soccer elite - SportsPro
Bayer Leverkusen hang on in Bundesliga, but shake-up is already under way | Bundesliga | The Guardian
Head of international affairs sought to grow Bayer 04 profile | SportBusiness
Rangers v Bayer Leverkusen: Flares, fights, offensive banners, boycotts, 'legal vacuum'..inside track on German ultras – The Scottish Sun | The Scottish Sun
Xabi Alonso Received Support From Bayer Leverkusen Fans Despite Exit from UEL after 0-0 vs AS Roma - YouTube
Bayer Leverkusen 'ultras' announce home boycott after rows with club - ESPN
Bayer 04 Leverkusen Fans With Electric Atmosphere Vs Atletico Madrid - YouTube