Spanish player Lamine Yamal was injured in Wednesday's match against Celta Vigo.
He was struck on the back of the thigh during a penalty kick and the 18-year-old was substituted because of the injury.
"The player will follow a careful treatment plan. Lamine Yamal will miss the rest of the season, and he is expected to be available for the World Cup," the club wrote on the X platform.
Spain is in Group H of this summer's World Cup along with Saudi Arabia, Uruguay and Cape Verde.
