Serena Williams wins fourth U.S. Open

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. 

2012 US Open - Day 14

NEW YORK, NY - SEPTEMBER 09: US Air Force F15e Strike Eagles fly over Arthur Ashe Stadium as members of the military unfurl the national flag before the start of the women's singles final match between Serena Williams of the United States and Victoria Azarenka of Belarus on Day Fourteen of the 2012 U.S. Open at the 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 Chris Trotman/Getty Images for USTA)

2012 US Open - Day 14

NEW YORK, NY - SEPTEMBER 09: Serena Williams of the United States serves during the women's singles final match against Victoria Azarenka of Belarus 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 Cameron Spencer/Getty Images)

Victoria Azarenka, of Belarus, reacts while playing against Serena Williams during the championship match at the 2012 US Open tennis tournament, Sunday, Sept. 9, 2012, in New York. (AP Photo/Darron Cummings)

Victoria Azarenka, of Belarus, reacts while playing against Serena Williams during the championship match at the 2012 US Open tennis tournament, Sunday, Sept. 9, 2012, in New York. (AP Photo/Darron Cummings)

2012 US Open - Day 14

NEW YORK, NY - SEPTEMBER 09: Serena Williams of the United States celebrates a point during the women's singles final match against Victoria Azarenka of Belarus 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)

Victoria Azarenka, of Belarus, reacts while playing against Serena Williams during the championship match at the 2012 US Open tennis tournament, Sunday, Sept. 9, 2012, in New York. (AP Photo/Darron Cummings)

Victoria Azarenka, of Belarus, reacts while playing against Serena Williams during the championship match at the 2012 US Open tennis tournament, Sunday, Sept. 9, 2012, in New York. (AP Photo/Darron Cummings)

Victoria Azarenka of Belarus, right, argues with the chair umpire during the championship match against Serena Williams at the 2012 US Open tennis tournament, Sunday, Sept. 9, 2012, in New York. (AP Photo/Mike Groll)

Victoria Azarenka of Belarus, right, argues with the chair umpire during the championship match against Serena Williams at the 2012 US Open tennis tournament, Sunday, Sept. 9, 2012, in New York. (AP Photo/Mike Groll)

2012 US Open - Day 14

NEW YORK, NY - SEPTEMBER 09: Victoria Azarenka of Belarus celebrates a point during the women's singles final match against Serena Williams of the United States 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 Matthew Stockman/Getty Images)

Serena Williams returns a shot to Victoria Azarenka, of Belarus, during the championship match at the 2012 US Open tennis tournament, Sunday, Sept. 9, 2012, in New York. (AP Photo/Charles Krupa)

Victoria Azarenka, of Belarus, returns a shot to Serena Williams during the championship match at the 2012 US Open tennis tournament, Sunday, Sept. 9, 2012, in New York. (AP Photo/Kathy Willens)

Serena Williams reacts after beating Victoria Azarenka, of Belarus, in the championship match at the 2012 US Open tennis tournament, Sunday, Sept. 9, 2012, in New York. Two points from defeat, Williams suddenly regained her composure to come back and win the last four games, beating No. 1-ranked Azarenka 6-2, 2-6, 7-5 on Sunday for her fourth U.S. Open title and 15th Grand Slam title overall. (AP Photo/Mike Groll)

2012 US Open - Day 14

NEW YORK, NY - SEPTEMBER 09: Serena Williams of the United States celebrates match point after defeating Victoria Azarenka of Belarus to win 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 Clive Brunskill/Getty Images)

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)

2012 US Open - Day 14

NEW YORK, NY - SEPTEMBER 09: Serena Williams of the United States lifts the championship trophy after defeating Victoria Azarenka of Belarus to win 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)

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