Watch: Bayern aim to maintain perfect record with Darmstadt test (FS1)

LEVERKUSEN, GERMANY - SEPTEMBER 12: Konstantin Rausch of Darmstadt shows thumbs up during the Bundesliga match between Bayer Leverkusen and SV Darmstadt 98 at BayArena on September 12, 2015 in Leverkusen, Germany. (Photo by Alex Grimm/Bongarts/Getty Images) PIRAEUS, GREECE - SEPTEMBER 16: Thomas Mueller of Muenchen celebrates his team's third goal during the UEFA Champions League Group F match between Olympiacos FC and FC Bayern Muenchen at Karaiskakis Stadium on September 16, 2015 in Piraeus, Greece. (Photo by Alex Grimm/Bongarts/Getty Images)