Azarenka surprises Sharapova in 3; Williams next

AP - Sports
Azarenka surprises Sharapova in 3; Williams next
Serena Williams reacts while playing Italy's Sara Errani during a semifinal match at the 2012 US Open tennis tournament, Friday, Sept. 7, 2012, in New York. Williams won the match. (AP Photo/Mike Groll)
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