The France international started the game on the bench but replaced Arthur at half-time with the game tied at 1-1.
Barcelona went on to win the match 3-1 but victory appears to have come at a cost to Dembele:
“FC Barcelona medical services have confirmed that after tests the first team player Ousmane Dembéle has a slight hamstring strain in his left leg.
“How the injury develops will decide whether he is available for the game against Olympique Lyonnais on Wednesday in the last 16 of the Champions League.”
Source | FC Barcelona
The youngster is now a doubt for Wednesday’s Champions League last 16 return leg against Lyon at the Camp Nou.
The tie is currently level at 0-0 meaning Barcelona will need to score to progress, and the loss of Dembele would be a huge blow for Ernesto Valverde.