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Andrea Pirlo injured his left calf muscle in the friendly loss to Mexico on Wednesday. ((Claudio Villa/Getty Images) )

Italy midfielder Andrea Pirlo is resting at home following an injury that could force him to miss the World Cup in South Africa.

The AC Milan midfielder injured his left calf muscle in the friendly loss to Mexico on Wednesday and will now sit out the friendly against Switzerland on Saturday.

The Italian Football Federation says Pirlo will travel with the team to South Africa and continue to be evaluated ahead of Italy's first match of the tournament, against Paraguay on June 14.

Pirlo was man of the match in the 2006 World Cup final and took a penalty in the shoot-out victory over France. He also scored Italy's first goal of the tournament, in the 2-0 victory over Ghana.