Barcelona suffered its first loss this season, losing 2-1 at Monaco Stadium in its first match in the Champions League.

Barcelona suffered a severe blow, as its player Eric Garcia was sent off 10 minutes after the starting whistle, which is the fastest expulsion of a player in the club in the history of its participation in the Champions League.

The hosts took advantage of their numerical superiority to open the scoring in the 16th minute through player Magnes Aklioch.

But Barcelona's rising star, Lamine Yamal, equalized for the Blaugrana with a left-footed shot in the 28th minute, becoming the second youngest to score for the team in the history of the Champions League.

Lamine Yamal, who scored a goal in two consecutive matches for the first time with Barcelona in 57 matches, became the second youngest player to score in the history of the Champions League at the age of 17 years and 68 days, surpassing his teammate Ansu Fati (17 years and 40 days).

By the 71st minute, substitute George Ilinykhina was able to score the winning goal for Monaco with a powerful shot after a quick counterattack