Barcelona will be without Neymar and Jordi Alba for the final month of the season after both were injured during the Copa del Rey final loss to Real Madrid on Wednesday.
Both players will likely miss all five rounds remaining in the Spanish league, further hurting Barcelona's chances of defending the title.
Barcelona officials say Neymar picked up a "contusion" on his left foot during the cup final, which ended with Neymar's shot hitting the post in the 90th minute.
Alba was substituted at halftime because of a muscle tear in his right leg.
Defender Marc Bartra will be a day-to-day decision as he recovers from a muscle pull.
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Barcelona host fourth-place Athletic Bilbao on Sunday without suspended midfielder Sergio Busquets.
