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NEW YORK, NY - AUGUST 31: Serena Williams of United States of America speaks with her partner Venus Williams of the United States of America during their women's doubles second round match against Raquel Kops-Jones of the United States of America and Abigail Spears of the United States of America on Day Six of the 2013 US Open at USTA Billie Jean King National Tennis Center on August 31, 2013 in the Flushing neighborhood of the Queens borough of New York City. (Photo by Al Bello/Getty Images)

NEW YORK, NY - AUGUST 31:  Serena Williams of United States of America speaks with her partner Venus Williams of the United States of America during their women's doubles second round match against Raquel Kops-Jones of the United States of America and Abigail Spears of the United States of America on Day Six of the 2013 US Open at USTA Billie Jean King National Tennis Center on August 31, 2013 in the Flushing neighborhood of the Queens borough of New York City.  (Photo by Al Bello/Getty Images)