Problems for Arturo Vidal. According to 'Radio Cooperativa', the midfielder didn't complete Monday's training session with Chile after feeling pain in the knee which was operated on.
The reports say that Vidal dropped out of the workout, accompanied by kinesthesiologist Pedro Oñate, to work on his own, so as not to do any further damage.
Chile are currently preparing for games against Japan and South Korea, with the Barça player a regular for his national side.
Vidal is still to start a league game for Barça after signing in the summer. He arrived from Bayern Munich having only just come back from a knee injury which required surgery.
Ernesto Valverde currently prefers Busquets, Rakitic and Coutinho as his midfield trio but Vidal has come on in each of the opening three Liga games.