Eintracht Frankfurt struck first through Ansgar Knauff in the 21st minute, but Koundé headed in goals in the 50th and 53rd to secure a 2-1 win—his first career brace and first for the club this season. Lamine Yamal assisted one and broke Kylian Mbappé's record for most goal involvements by an 18-or-younger player in Champions League history. UEFA named Koundé Player of the Match, capping Barcelona's third straight comeback victory while boosting their league phase standing.