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NEW YORK, NY - SEPTEMBER 12: Flavia Pennetta of Italy celebrates after defeating Roberta Vinci of Italy during their Women's Singles Final match on Day Thirteen of the 2015 US Open at the USTA Billie Jean King National Tennis Center on September 12, 2015 in the Flushing neighborhood of the Queens borough of New York City. Pennetta defeated Vinci 7-6, 6-2. (Photo by Michael Heiman/Getty Images)

NEW YORK, NY - SEPTEMBER 12:  Flavia Pennetta of Italy celebrates after defeating Roberta Vinci of Italy during their Women's Singles Final match on Day Thirteen of the 2015 US Open at the USTA Billie Jean King National Tennis Center on September 12, 2015 in the Flushing neighborhood of the Queens borough of New York City. Pennetta defeated Vinci 7-6, 6-2.  (Photo by Michael Heiman/Getty Images)