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 quickly capitalized on their advantage with Maghnes Akliouche scoring shortly after the red card. Barcelona’s young star Lamine Yamal responded with a precise shot in the 28th minute, but George Ilenikhena later sealed the victory for Monaco with a goal in the latter stages of the match.

Barcelona travel to Monaco for their UEFA Champions League opener on Thursday. Things didn't go according to plan for Hansi Flick and Co.

Barcelona coach Hansi Flick said he is not worried about his side's performance despite the 2-1 defeat to Monaco in their Champions League opener on Thursday.

Monaco defeated Barcelona after the LaLiga club went down to 10 men, Atletico clinched a late winner vs. Leipzig and Arsenal tied against Atalanta.

Barcelona had a dreadful start at the Stade Louis II stadium when Garcia was shown a straight red card 11 minutes in for a foul on Monaco's Takumi Minamino, who was clear in front of goal after a misplaced pass from goalkeeper Marc-Andre ter Stegen.

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.

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.