The first week of the new-look Champions League came to an end on Thursday, with Barcelona and Arsenal both in action.

MONACO (AP) — Barcelona’s perfect start to the season ended with a 2-1 loss at Monaco in the revamped Champions League on Thursday, a defeat which happened after defender Eric Garcia was sent off after 11 minutes.

Monaco have had a solid start to the Ligue 1 season thanks to strong play from their defense but they haven't faced a team who can attack like Barcelona so this will be a good test to see how far they can go. Here's our storylines, how you can watch the match and more: