The Billie Jean King Cup is the premier international team competition in women's tennis, launched as the Federation Cup in 1963 to celebrate the 50th anniversary of the International Tennis Federation (ITF). The name was changed to the Fed Cup in 1995, and changed again in September 2020 in honor of former World No. 1 Billie Jean King. The Billie Jean King Cup is the world's largest annual women's international team sports competition in terms of the number of nations that compete. The current Chairperson is Katrina Adams.
The relatively small nation of Czech Republic dominated the Fed Cup in the 2010s, as the Czechs won six of ten competitions in the decade. The men's equivalent of the Billie Jean King Cup is the Davis Cup, and the Czech Republic, Australia and the United States are the only countries to have held both Cups at the same time.