Barcelona have lost another player to injury after announcing midfielder Frank Kessie pulled up in training on Wednesday.
The Ivory Coast international, who was a late substitute in Tuesday's 1-0 Champions League loss at Inter, strained an adductor muscle in his right thigh.
Barca said in a statement that the 25-year-old's injury will be monitored, but no timeframe has been put on his return to action.
He has played eight times for the Catalan giants since joining as a free agent from Milan in the close season, six of those coming as a substitute.
Kessie's injury came on the same day Barca confirmed Andreas Christensen suffered a ligament sprain during the highly contentious defeat to Inter.
They join Ronald Araujo, Jules Kounde, Hector Bellerin, Frenkie de Jong and Memphis Depay on the sidelines during a gruelling run of fixtures for Barca.
Xavi's side host Celta Vigo and Inter in LaLiga and the Champions League respectively over the next week, before taking on Real Madrid in a top-of-the-table Clasico on October 16.