The Spanish visitors were already 2-0 up at Anfield after just 29 minutes. But before half-time, Liverpool had fought back to equalise. Early in the second half, Alexis Mac Allister made it 3-2 to complete the turnaround.
Alexander Isak, who returned from injury this weekend and scored in the league game against Brentford (2–1), came on in the 66th minute but failed to score.
Liverpool claimed their third win in as many matches in this autumn's Champions League.