Barcelona boss Ernesto Valverde has revealed that Lionel Messi and Marc-Andre ter Stegen will undergo fitness tests ahead of this weekend's meeting with Sevilla.
Messi was absent from both of Argentina's friendlies over the international break due to a minor hamstring problem, while Ter Stegen is nursing a knee injury that saw him miss Germany's defeat to Brazil.
Both players are now doubtful for Saturday evening's trip to the Ramon Sanchez Pizjuan, though Valverde remains confident that star man Messi will return in time.
"We do not know too much about the physical condition of Messi and Ter Stegen," he told reporters. "This Thursday they will undergo medical tests to assess their status.
"I'm calm about Messi's injury. Tomorrow we will see how he feels. Messi finished the last game with Athletic Bilbao well, it is true that he had a little trouble, but it was nothing important. I still do not know what we are going to do, we think and hope it is not important.
"We are not going to worry before time, when the doctors see him we will decide the steps to follow, but we think it is not important. We will play in all of the competitions this month and we will see how the players are when they return from international duty. The three points against Sevilla can be quite decisive."
Jasper Cillessen and Andre Gomes were both back in training with Barcelona on Wednesday, meanwhile, after returning from international duty.