Unique gathering of former women 's No.1 tennis players at Wimbledon . Score: One voice . 6 Tributes paid to first WTA president Billie Jean King . Current No.1 Serena Williams took center stage .
Unique gathering of former women 's No.1 tennis players at Wimbledon . Score: 6 Tributes paid to first WTA president Billie Jean King . Current No.1 Serena Williams took center stage .