Barcelona forward Alexis Sanchez has been ruled out for four weeks after sustaining a foot injury on international duty. The Chile international limped out of his country\'s 3-1 defeat by Serbia after 20 minutes following a challenge from Luka Milivojevic, with tests immediately pencilled in to determine the extent of the damage. And Barça will not be pleased to hear that the former Udinese man has been diagnosed with a sprained ligament in his right foot. He is set to miss up to eight games - the domestic fixtures against Real Zaragoza, Levante, Alaves, Athletic Bilbao, Real Betis and Atletico Madrid, and the UEFA Champions League clashes with Spartak Moscow and Benfica. From : Fifa