Xabi Alonso's back injury has kept him out of the Spain squad for this summer's Confederations Cup.
Xabi Alonso's back injury has kept him out of the Spain squad for this summer's Confederations Cup.
Dani Pozo /Getty Images

MADRID (AP) -- Real Madrid says midfielder Xabi Alonso has undergone surgery after missing several games at the end of last season because of back pain.

The 31-year-old Alonso was left out of Spain's squad for the Confederations Cup in June in Brazil because of the problem.

Madrid says Alonso was operated on by the specialist Ulrike Muschaweck in Munich, Germany.

The Spanish club did not indicate how long Alonso is expected to be out while recovering.

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