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AP Ryan Harrison ties his shoe laces during a match against Argentina's Juan Martin Del Potro in the third round of play at the 2012 US Open tennis tourn - Photo

Ryan Harrison ties his shoe laces during a match against Argentina's Juan Martin Del Potro in the third round of play at the 2012 US Open tennis tourn

Friday August 31, 09:19 PM
Ryan Harrison ties his shoe laces during a match against Argentina's Juan Martin Del Potro in the third round of play at the 2012 US Open tennis tournament, Friday, Aug. 31, 2012, in New York. (AP Photo/Paul Bereswill)