Milos Raonic of Canada plays against Thomas Fabbiano of Italy during their US Open men's singles match at the USTA Billie Jean King National Tennis Center in Flushing on Aug. 27 , 2013. (credit: Getty Images)
US Open Day 2
Misaki Doi of Japan returns a shot to Petra Kvitova of the Czech Republic during their US Open women's singles match at the USTA Billie Jean King National Tennis Center on Aug. 27, 2013 in Flushing. (credit: Getty Images)
US Open Day 2
Petra Kvitova of the Czech Republic returns a shot against Misaki Doi of Japan during their first-round women's singles match on Day 2 of the US Open at USTA Billie Jean King National Tennis Center on Aug. 27, 2013 in Flushing. (credit: Getty Images)
US Open Day 2
Caroline Wozniacki of Denmark returns a shot to Ying-Ying Duan of China during their US Open women's singles match at the USTA Billie Jean King National Tennis Center on Aug. 27, 2013 in Flushing. (credit: Getty Images)
US Open Day 2
Guido Pella of Argentina plays against Sam Querrey of the United States during their US Open men's singles match at the USTA Billie Jean King National Tennis Center in Flushing on Aug. 27, 2013. (credit: Getty Images)
US Open Day 2
Ying-Ying Duan of China returns a shot to Caroline Wozniacki of Denmark during their US Open women's singles match at the USTA Billie Jean King National Tennis Center on Aug. 27, 2013 in Flushing. (credit: Getty Images)
US Open Day 2
Golfer Rory McIlroy (right) sits in the family box of Caroline Wozniacki of Denmark, his girlfriend, to watch the women's singles match between Wozniacki and Ying-Ying Duan of China during the US Open at the USTA Billie Jean King National Tennis Center on Aug. 27, 2013 in Flushing. (credit: Getty Images)
US Open Day 2
Christina McHale of the United States chases down a shot by Julia Goerges of Germany during their US Open women's singles match at the USTA Billie Jean King National Tennis Center in Flushing on Aug. 27, 2013. (credit: Getty Images)
US Open Day 2
Thomas Fabbiano of Italy pumps his fist during play against Milos Raonic of Canada during their US Open men's singles match at the USTA Billie Jean King National Tennis Center in Flushing on Aug. 27, 2013. (credit: Getty Images)
US Open Day 2
Grigor Dimitrov of Bulgaria celebrates a point against Joao Sousa of Portugal during their US Open men's singles match at the USTA Billie Jean King National Center Aug. 27, 2013 in Flushing. (credit: Getty Images)
US Open Day 2
Sara Errani of Italy against Olivia Rogowska of Australia during their US Open women's singles match at the USTA Billie Jean King National Tennis Center in Flushing on Aug. 27, 2013. (credit: Getty Images)
US Open Day 2
Roger Federer of Switzerland returns a shot to Grega Zemlja of Slovenia during their US Open men's singles match at the USTA Billie Jean King National Tennis Center on Aug. 27, 2013 in Flushing. (credit: Getty Images)
US Open Day 2
Roger Federer of Switzerland shakes hands at the net with Grega Zemlja of Slovenia after their first-round men's singles match on Day 2 of the US Open at USTA Billie Jean King National Tennis Center on Aug. 27, 2013 in Flushing. (credit: Getty Images)
US Open Day 2
Philadelphia Phillies players Kevin Frandsen, John McDonald and Michael Young talk with tennis player Ana Ivanovic of Serbia on Day 2 of the US Open at USTA Billie Jean King National Tennis Center on Aug. 27, 2013 in Flushing. (credit: Getty Images)
US Open Day 2
Denis Istomin of Uzbekistan returns a shot to Nicolas Almagro of Spain during their first-round men's singles match on Day 2 of the 2013 US Open at USTA Billie Jean King National Tennis Center on Aug. 27, 2013 in Flushing. (credit: Getty Images)
US Open Day 2
Samantha Stosur of Australia plays against Victoria Duval of the United States during their US Open women's singles match at the USTA Billie Jean King National Tennis Center in Flushing on Aug. 27 , 2013. (credit: Getty Images)
US Open Day 2
Daniela Hantuchova of Slovakia reacts after defeating Maria Sanchez of the United States in their first-round women's singles match on Day 2 of the US Open at USTA Billie Jean King National Tennis Center on Aug. 27, 2013 in Flushing. (credit: Getty Images)
TEN-US OPEN-SVITOLINA
Elina Svitolina of the Ukraine celebrates her win over Dominikia Cibulkova of Slovakia during their US Open 2013 women's singles match at the USTA Billie Jean King National Center on Aug. 27, 2013 in Flushing. (credit: Getty Images)
US Open Day 2
Juan Monaco of Argentina returns to Florian Mayer of Germany during their US Open men's singles match at the USTA Billie Jean King National Center on Aug. 27 in Flushing. (credit: Getty Images)
US Open Day 2
Serbian tennis player Novak Djokovic plays a point against Lithuania's Ricardas Berankis during their US Open men's singles match at the USTA Billie Jean King National Tennis Center in Flushing on Aug. 27, 2013. (credit: Getty Images)
US Open Day 2
Serbian tennis player Novak Djokovic plays a point against Lithuania's Ricardas Berankis during their US Open men's singles match at the USTA Billie Jean King National Tennis Center in Flushing on Aug. 27, 2013. (credit: Getty Images)
