Full highlights between Celtic and Barcelona.
Lionel Messi gives Barcelona a 1-0 lead against Celtic.
Justin Bieber and Neymar have a kick around
He's a good little athlete
Take a look back at all the best action from Matchday 4.
Full highlights between Manchester City and Barcelona.
De Bruyne's fantastic free kick gives Man City the lead.
Messi gives Barcelona a 1-0 lead against Manchester City.
Neymar has signed a new five-year contract with Barcelona.
Leo Messi scored his second consecutive hat trick in UCL.