Juan Martin del Potro of Argentina celebrates after the Singles Group B match between Argentinian Juan Martin del Potro and French Richard Gasquet at the O2 Arena in London, Britain, Nov. 4, 2013. Juan Martin del Potro won 2-1. (Xinhua/Wang Lili)
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Juan Martin del Potro of Argentina celebrates after the Singles Group B match between Argentinian Juan Martin del Potro and French Richard Gasquet at the O2 Arena in London, Britain, Nov. 4, 2013. Juan Martin del Potro won 2-1. (Xinhua/Wang Lili)
