Group B continued to surprise as Club Brugge maintained their perfect record with a shockingly convincing victory over Atletico Madrid.
A cagey affair in the opening stages saw chances shared between both sides, which made Kamal Sowah's opening goal after 36 minutes all the more important in tipping the scales.
Proceedings remained open after the break as Atleti pushed hard for an equaliser. It proved their undoing, though, as Brugge doubled their lead just after the hour mark through Ferran Jutgla, leaving the Spanish side scratching their heads. And when Antoine Griezmann missed a penalty with just under 15 minutes to go, the writing was on the wall.
Brugge are sitting high and mighty at the top of the group with nine points, while Atletico, Porto and Bayer Leverkusen all remain stuck on three points.