Defender Jules Kounde scored twice as Barcelona fought back from a goal down to beat Eintracht Frankfurt – in Barca’s first Champions League game at the Nou Camp in more than three years.
The visitors went ahead in the 21st minute when Ansgar Knauff raced on to Nathaniel Brown’s pass, held off Alejandro Balde and slotted the ball past Joan Garcia.
England forward Marcus Rashford, on as a half-time substitute, made an instant impact as his cross from the left was headed in by Kounde in the 50th minute.
The France defender scored his second three minutes later, this time connecting with Lamine Yamal’s delivery when unmarked six yards out.
The victory takes five-time European champions Barca on to 10 points from their six matches and, with two games to go, still in contention to claim a top-eight place that would see them jump straight into the last 16 and avoid the play-off round.
Hansi Flick’s side play at Slavia Prague on 21 January and end their league phase campaign at home to Copenhagen a week later.
Meanwhile, Eintracht Frankfurt, seventh in the German Bundesliga, are in serious danger of being eliminated from European competition as they only have four points from their opening six matches.