Kei Nishikori celebrates after he beat John Isner 4-6, 6-4, 6-4, in a men's singles final match at the Citi Open on Sunday at the Rock Creek Park Tennis Center. (Associated Press)
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Kei Nishikori celebrates after he beat John Isner 4-6, 6-4, 6-4, in a men's singles final match at the Citi Open on Sunday at the Rock Creek Park Tennis Center. (Associated Press)
