Barcelona goalkeeper Claudio Bravo will be sidelined for up to three weeks, according to his agent.
Bravo suffered a calf injury in training on Monday but Barca did not say how long the Chile international would be sidelined for.
However, Bravo's agent, Cristian Ogalde, told Chilean radio station Radio Cooperativa: "The news worried all of us at the beginning but Claudio is well. It's a muscular injury that happens without any specific reasons.
"I spoke to him and he is calm. It's an injury that will take up to three weeks to be fit 100 percent."
Bravo will miss Saturday's La Liga clash at Atletico Madrid and is also likely to miss the league games against Levante, Celta Vigo and Las Palmas this month.
Marc-Andre ter Stegen, the club's first choice in the Copa del Rey and Champions League, is set to make his first Primera Division appearances in Bravo's absence.
Barca are set to be without a number of players for the Atletico clash, with Gerard Pique suspended and Dani Alves and Douglas Pereira out through injury.
Sergi Roberto, who did not train on Tuesday, remains doubtful after a hamstring injury.