Take a look back at all the best action from matchday 2.
Leo Messi scores a hat trick.
Full highlights between Barcelona and Celtic.
Luis Suarez scores an amazing goal against Celtic.
Lionel Messi scores his third goal against Celtic.
Andres Iniesta makes it 4-0 for Barcelona against Celtic.
Watch Neymar score Barcelona's third goal against Celtic.
Messi scores his second goal to give Barcelona a 2-0 lead.
Lionel Messi gives Barcelona an early lead against Celtic.
Moussa Dembele scores hat-trick for Celtic on derby day.