The 19-year-old was tackled from behind and his knee buckled during already-qualified Spain's 3-1 win in Valladolid on Sunday, and he left the pitch in tears.
"The player will have surgery in the coming days, after which a new medical update will be released." The club did not predict how long Gavi would be sidelined for but, with Euro 2024 kicking off on June 14, he could face an uphill task to be fit in time.
Gavi has established himself as a key figure both for Barcelona and the Spanish national team over the past two years after coming through his club's La Masia youth academy.
"His injury is a big blow for all Barca fans and so here is a chance to send him a message of support," Barcelona wrote on their website.
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