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Tennis - Barclays ATP World Tour Finals - 02 Arena, London - 11/11/12 Men's singles - General view Mandatory Credit: Action Images / Tony O'Brien Stock Photo - Alamy
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Tennis - Barclays ATP World Tour Finals - 02 Arena, London - 6/11/12 Men's Singles - General view of Serbia's Janko Tipsarevic and Switzerland's Roger Federer (L) during their Group B round
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