Jack Wilshere found a good chunk of form to help Arsenal record another win, while Jose Mourinho's Chelsea suffered defeat but still secured qualification thanks to Schalke dropping points at Steaua Bucharest.
Check out the best pictures from the continental melting pot of intense emotions, fan devotions and Napoli boss Rafa Benitez doing his best rapping impression (yes, really) below!
Gaga for Kaka | The midfielder kicked off a top night for AC Milan, as they beat Celtic 3-0
Salah steamtrain | The Basel winger, who scored the winner, whizzes past Chelsea's Petr Cech
Whose Hoesen? | The Ajax star's 42nd minute strike saw Ajax edge past Barcelona 2-1
Eye on the ball | Willian uses acrobatics to keep possession for Chelsea
Bore draw | Steaua Bucharest and Schalke couldn't be separated in a 0-0 stalemate
Jack the lad | The England midfielder pops up with a double to help Arsenal defeat Marseille
Oh, Vienna | Jackson Martinez's second-half strike keeps Porto's hopes alive but slender
Jumping for joy | Aubameyang's strike completes Dortmund's 3-1 win over Napoli
Doing the double | Basel brushed aside Chelsea for the second time this season
The Cocooned One | Mourinho's men still qualify despite defeat in Switzerland