‘Greatest player’: Billie Jean King leads tennis tributes to Serena Williams

• King hails 40-year-old following her retirement announcement
• She definitely changed the game,' says Emma Raducanu

Billie Jean King, the former women's world No 1, has led tributes within tennis to Serena Williams, describing her as the sport's greatest player" following the 23-time grand slam singles champion's announcement that she is retiring.

In a column for Vogue, the 40-year-old Williams described her intention to finish her playing career as an evolution" away from tennis and indicated she could step away after the upcoming US Open.