Jerzy Janowicz, of Poland, returns a shot to David Goffen, of Belgium, in their match at the Winston-Salem Open tennis tournament in Winston-Salem, N.C., Thursday, Aug. 21, 2014. (AP Photo/Chuck Burton)

Winston Salem Open Tennis

Jerzy Janowicz, of Poland, returns a shot to David Goffen, of Belgium, in their match at the Winston-Salem Open tennis tournament in Winston-Salem, N.C., Thursday, Aug. 21, 2014. (AP Photo/Chuck Burton)

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