Barcelona made a disappointing start to their Champions League campaign, losing 2-1 to Monaco after defender Eric Garcia was shown a straight red card in the 11th minute of the match. Garcia dangerously fouled Monaco's Takumi Minamino early in the match played at the Stade Louis-2 stadium.
After this, Barcelona had to play with 10 players for 80 minutes. Host Monaco took a 1-0 lead in the fifth minute with the help of Magnes Aquiloche's low shot, but in the 28th minute, Lamin Yamal scored from the corner of the penalty area to equalize the score to 1-1 for Barcelona. This was Yamal's first goal in the Champions League. Monaco continued to try to score goals. In the 71st minute, substitute player George Elenikina scored a goal by leaving Ter Stegen behind. This was Monaco's first victory against a major team in Europe's exclusive club league in five years.
In another Champions League match, Arsenal goalkeeper David Raya displayed brilliant goalkeeping as the match against Atalanta ended in a 0-0 draw with both teams getting a point each. Raya made a brilliant dive to save Spain's Matteo Retegui's spot kick in the 51st minute and then also blocked the forward's follow-up header.