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The BBC's Amol Rajan in interviewing tennie legend Billie Jean King tonight. She was perhaps one of the greatest doubles players in the history of tennis, winning 27 major titles. With her victories in 1967, she was the first woman since 1938 to sweep the US and British singles, doubles, and mixed doubles titles in a single year. Billie Jean King. In 1973, at age 29, she won the "Battle of the Sexes" tennis match against the 55-year-old Bobby Riggs.

The match was viewed by an estimated fifty million people in the United States and ninety million worldwide.

The victory marked a major breakthrough for women in sport.

King has since made a name for herself as an equality activist, and took aim at John McEnroe after he made controversial comments about Serena Williams.

Speaking in 2017 , she accused him of