Spain and Bayern Munich midfielder Thiago Alcantara was ruled out of the World Cup on Thursday after suffering a setback in his recovery from a knee injury.

Thiago suffered a recurrence of the ligament tear in his right knee last Monday and will undergo an operation soon, Bayern said on its website.

The club said it's ''not possible'' for the 23-year-old to play in Saturday's German Cup final against Borussia Dortmund or at the World Cup.

Thiago was named to Spain's provisional 30-man World Cup roster last week, but won't play in Brazil.

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''It's bitter for Thiago. We're sorry for the guy,'' Bayern chairman Karl-Heinz Rummenigge said. ''A young lad who's been working on his comeback and on the World Cup in the land of his father, and suddenly both dreams are shot.''