The 2011 US Open was a tennis tournament played on the outdoor hard courts at the Billie Jean King National Tennis Center in Flushing Meadows Park, of Queens, New York City, United States. It began on August 29 and was originally scheduled to end on September 11, but the men's final was postponed to September 12 due to rain.

Serena Jameka Williams is an American former professional tennis player. Widely regarded as one of the greatest tennis players of all time, she was ranked world No.1 in singles by the Women's Tennis Association (WTA) for 319 weeks, including a joint-record 186 consecutive weeks, and finished as the year-end No.1 five times. She won 23 major women's singles titles, the most in the Open Era, and the second-most of all time. She is the only player to accomplish a Career Golden Slam in both singles and doubles.