Jack Wilshere is believed to have suffered a fracture of his left fibula during training.

Wilshere missed nearly six months last season after injuring his ankle.

Unconfirmed reports suggested he was injured by a tackle from the Brazilian defender Gabriel.

Sami Khedira will miss two months after sustaining a thigh injury.

Khedira joined Juventus from Real Madrid this summer.

A statement on Juve's official website read: "Sami Khedira will be sidelined for approximately two months after medical examinations revealed a second-grade myotendinous tear of the rectus femoris muscle in his right thigh.

"The German midfielder sustained the injury during last Saturday's preseason friendly against Olympique Marseille at the Stade Velodrome."