At 80, the tennis figurehead has had as much impact on sport as perhaps anyone in her lifetime. She isn't ready to stop now.

The iconic Billie Jean King might have been at her peak in the 1960s and 70s but the American now wants tennis to scrap a long-standing tradition. The American, who won 12 Grand Slam titles and has long campaigned for equality in her sport, remains an influential figure in her sport.

Billie Jean King wants tennis to change its traditional scoring system to attract the next generation of fans.