Isner, Berdych pull out of Winston-Salem Open

AP - Sports
Isner, Berdych pull out of Winston-Salem Open
John Isner reacts after missing a shot against Rafael Nadal, from Spain, during the finals match at the Western & Southern Open tennis tournament on Sunday, Aug. 18, 2013, in Mason, Ohio. Nadal won 7-6 (8), 7-6 (3). (AP Photo/Al Behrman)
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