The 2009 WTA Tour Championships was held in Doha, Qatar from October 27 to November 1. It was the second time the Khalifa International Tennis Complex hosted the WTA Tour Year-End Singles and Doubles Championships.

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.