No US male in quarterfinals at Key Biscayne

AP - Sports
No US male in quarterfinals at Key Biscayne
Serena Williams celebrates her 6-3, 7-6(5) win against Li Na, of China, during the Sony Open tennis tournament in Key Biscayne, Fla., Tuesday, March 26, 2013. (AP Photo/Luis M. Alvarez)
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