The Billie Jean King Cup is an international women's tennis competition, formerly known as the Fed Cup. It features national teams from around the world competing in a knockout format. The tournament is held annually, with teams vying for the prestigious title through a series of matches. Named after the legendary tennis player Billie Jean King, the cup aims to promote women's tennis and provide a platform for female athletes. The event showcases top players representing their countries, fostering a spirit of competition and camaraderie among nations.