August 31, 2012
Jack Sock, a 19-year-old rising star, was one of the Americans who advanced Thursday at the U.S. Open, where Sock announced his arrival on the same day Andy Roddick announced his retirement.
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On a busy day at the U.S, Open that saw Andy Roddick announce his retirement, American men have a big day, including wins by Mardy Fish and rising star, 19-year-old Jack Sock, while Roger Federer wins easily and No. 5 Jo-Wilfred Tsonga loses, and Serena Williams advances on the women's side.