WASHINGTON, DC - JULY 30: Jack Sock returns a shot to Igor Sijsling of the Netherlands during the Citi Open at the William H.G. FitzGerald Tennis Center on July 30, 2013 in Washington, DC. (Photo by ... more 
WASHINGTON, DC - JULY 30: Jack Sock returns a shot to Igor Sijsling of the Netherlands during the Citi Open at the William H.G. FitzGerald Tennis Center on July 30, 2013 in Washington, DC. (Photo by Matthew Stockman/Getty Images) less 
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Getty Images | Photo By Matthew Stockman / Getty Images
Tue, Jul 30, 2013 8:04 PM EDT