Serena Williams enters the 2014 US Open as the No. 1 seed in the women's draw, looking to capture the title for the third year in a row. Her opening round matchup will be fellow countryman Taylor Townsend.
Here is a look back at Williams' past performances at the US Open.
Williams entered the 2013 tournament as the No. 1 seed and wound up matched up with Victoria Azarenka in the finals. Williams won in three sets.
The victory pushed Williams' career prize money over $50 million.
Williams became the oldest US Open champion in the Open Era, at 33 years of age.
Williams has appeared in 15 US Opens, going 72-9 in her matches.
She has only missed the tournament twice, 2003 and 2010, since first appearing in it in 1998.
Williams has now won the US Open a total of five times: 1999, 2002, 2008, 2012, and 2013. Two other times, 2001 and 2011, she lost in the finals.
Williams has won the US Open doubles tournament twice, in 1999 and 2009. Each time she was paired with her sister, Venus.
Williams became the first woman to spend 200 or more weeks at the top of the WTA rankings in early August 2014.
In 2014, Williams' best finish was a fourth round effort at the Australian Open. Afterwards, Williams cited a back injury.
- Aaron Somers