WASHINGTON, DC - JULY 30: Leonardo Mayer of Argentina returns a shot to Guillermo Garcia-Lopez of Spain during the Citi Open at William H.G. FitzGerald Tennis Center on July 30, 2012 in Washington, ... more 

WASHINGTON, DC - JULY 30: Leonardo Mayer of Argentina returns a shot to Guillermo Garcia-Lopez of Spain during the Citi Open at William H.G. FitzGerald Tennis Center on July 30, 2012 in Washington, DC. (Photo by Matthew Stockman/Getty Images) less