Alexandre Pato has been called up to Brazil\'s squad for their friendlies before the London Olympics after the forward\'s club AC Milan gave him the all-clear on Wednesday. Milan said the 22-year-old had healed from a thigh injury he suffered in April, the latest in the long string of leg-muscle problems that have dogged him over the last two and a half years. Milan centre back Thiago Silva, who has been out of action since 24 March with a thigh problem, was also named in the squad.