John Isner returns a serve against Andy Murray, from Great Britain, during a match at the Western & Southern Open tennis tournament, Thursday, Aug. 14, 2014, in Mason, Ohio. (AP Photo/Al Behrman)

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John Isner returns a serve against Andy Murray, from Great Britain, during a match at the Western & Southern Open tennis tournament, Thursday, Aug. 14, 2014, in Mason, Ohio. (AP Photo/Al Behrman)

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