Sierra appeared to suffer a shoulder injury Monday and was seen in tears after leaving Monday's match against Levante, according to El Desmarque.
Analysis:Sierra left the game midway through the second half, and the fact that he was spotted in tears after exiting the game suggests the issue might be significant. Further tests will be needed, but for the time being, he should be considered questionable to face Real Madrid on Sunday. Chidera Ejuke could be in line to take his place in the lineup if he's forced to miss time.
