Madrid: Barcelona's failure to beat Celta Vigo in a thrilling 2-2 draw at Camp Nou on Saturday was compounded by injuries to Samuel Umtiti and captain Andres Iniesta.
With just three weeks to go until Barca face Real Madrid in the first El Clasico of the season at the Santiago Bernabeu, Umtiti in particular faces a race to be fit for December 23.
In doubly bad luck for Barca, the French international pulled up with a hamstring injury to allow Iago Aspas to sprint in behind the Barca defence and tee up Maxi Gomez to hand Celta a share of the points 20 minutes from time.
"It was a series of unfortunate incidents in the one move," lamented Barca boss Ernesto Valverde.
Umtiti has been a rock at the heart of the Barca defence as the Catalans had conceded just six goals in their previous 20 games prior to Celta's visit.
"We think it is a tear. He has spoken to the doctors but we will have to see the tests tomorrow to discover the extent of the injury," added Valverde. "It is a problem to lose an important player like Samuel, who was in great form."
Iniesta also asked to be replaced just five minutes into the second-half.