The 36-year-old, who signed a new one-year contract earlier this summer, was hurt in a collision with goalkeeper Nikola Milojevic in Wednesday night´s 1-1 draw with Vitoria de Setubal in Portugal.
Manager Roy Keane told the club´s official website, www.safc.com: "We thought it was just a bang on the head, but there could be a fracture there, around his eye. He will be out for a number of weeks."
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