Ousmane Dembele will undergo tests on Monday to determine the extent of a sprained ankle he sustained in Barcelona's win over Leganes on Sunday.
Dembele was replaced by Malcom in the 69th minute of the match at the Camp Nou after coming off the worse in a clash with Leganes' Mikel Vesga.
Barcelona confirmed on their Twitter account that Dembele would be examined on Monday, leaving Ernesto Valverde to sweat over the fitness of the French forward.
In the absence of Lionel Messi from the starting lineup, Dembele had been Barcelona's best player against Leganes prior to his injury, scoring the opening goal and showing some wonderful moments of skill to unlock the visitor's defence.