Argentina's Leonardo Mayer reacts during his match against Argentina's Juan Martin Del Potro in the third round of play at the 2012 US Open tennis tournament, Sunday, Sept. 2, 2012, in New York. ... more 

Argentina's Leonardo Mayer reacts during his match against Argentina's Juan Martin Del Potro in the third round of play at the 2012 US Open tennis tournament, Sunday, Sept. 2, 2012, in New York. Mayer lost the match. (AP Photo/Paul Bereswill) less