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2012 US Open - Day 14

NEW YORK, NY - SEPTEMBER 09: Serena Williams of the United States poses with the championship trophy next to Victoria Azarenka of Belarus following her victory in the women's singles final match on Day Fourteen of the 2012 US Open at USTA Billie Jean King National Tennis Center on September 9, 2012 in the Flushing neighborhood of the Queens borough of New York City. (Photo by Al Bello/Getty Images)

Serena Williams wins fourth U.S. Open

January 1, 1970

No. 4 Serena Williams won the first set and held on in the third to defeat No. 1 Victoria Azarenka 6-2, 2-6, 7-5 on Sunday in the women's singles final of the U.S. Open at Flushing Meadows. Williams continues to dominate after her gold-medal run in the 2012 London Olympics.