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

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:

Barcelona's perfect start to the season hit its first stumbling block when defender Eric Garcia was sent off after just 11 minutes at Monaco in the revamped Champions League on Thursday. Garcia pulled back Takumi Minamino when the Japan forward intercepted a panicky pass out from Barcelona goalkeeper Marc-André ter Stegen.