Barcelona goalkeeper Claudio Bravo is a doubt for Saturday's Primera Division clash at Atletico Madrid after sustaining a calf injury.
Bravo picked up the injury during training on Monday and the 32-year-old faces a battle to prove his fitness for the clash with Diego Simeone's men.
A Barca statement on Tuesday read: "Analysis by FC Barcelona's medical personnel has revealed that first-team goalkeeper Claudio Bravo has suffered a muscular injury to his right calf.
"The muscle in question is Bravo's right soleus. He will be closely monitored over the coming days and his availability for this weekend's match at Atletico de Madrid will be determined based on how the injury evolves."
.@FCBarcelona goalkeeper Claudio Bravo sits out with right calf strain: http://t.co/k5d1M7OJbM pic.twitter.com/5EcIbLSbsw
- FC Barcelona (@FCBarcelona) September 8, 2015
Bravo, who won the Copa America with Chile in July, started in Barcelona's first two La Liga games and kept clean sheets.
Should he fail to prove his fitness, Marc-Andre ter Stegen would make his La Liga debut for Barca.
Ter Stegen, who joined from Borussia Monchengladbach last year, was Barca's first-choice keeper for the Copa del Rey and Champions League last season.
Barca coach Luis Enrique is hoping defender Sergi Roberto will recover in time for Saturday's encounter in Madrid.
The Blaugrana are without right-back Dani Alves, who is out with a groin injury, while centre-back Gerard Pique is suspended.
Sergi Roberto, who did not feature in Monday's training session, is working to recover from a hamstring injury.