Djokovic upset by Tommy Haas at Key Biscayne

AP - Sports
Djokovic upset by Tommy Haas at Key Biscayne
Serena Williams, of the United States, celebrates her 6-3, 7-6 (5) win against Li Na, of China, in the quarterfinals of the Sony Open tennis tournament in Key Biscayne, Fla., Tuesday, March 26, 2013. (AP Photo/Alan Diaz)
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