Grigor Dimitrov, of Bulgaria, checks the sole of his shoe between games against Gael Monfils, of France, during the fourth round of the 2014 U.S. Open tennis tournament, Tuesday, Sept. 2, 2014, in New York. (AP Photo/Mike Groll)

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Grigor Dimitrov, of Bulgaria, checks the sole of his shoe betw…
The Associated Press

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