Dembele has been out of action since he suffered a torn hamstring after coming off the bench against Lyon in the last round on 14 March.

Valverde accepted he took a risk in playing Dembele in that game, the winger having been a pre-match injury doubt.

Dembele was expected to miss both legs of the quarter-final against United but returned to training earlier than expected and could feature at Old Trafford this week if cleared by the club's doctors.