The International Tennis Federation (ITF) is the governing body of world tennis, wheelchair tennis, and beach tennis. It was founded in 1913 as the International Lawn Tennis Federation by twelve national tennis associations. As of 2016, there are 211 national and six regional associations that make up the ITF's membership.
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 chair is Katrina Adams.
The Italy women's national tennis team represents Italy in international women's tennis and is directed by the Federazione Italiana Tennis. The team played in the first ever tournament in 1963, and is one of four teams that has taken part in every single edition since.
The Argentina women's national tennis team represents Argentina in Billie Jean King Cup tennis competition and are governed by the Asociación Argentina de Tenis. The team's historical best results came in 1986 and 1993, when they reached the semifinals. Argentina played the last five years in the Americas Zone Group I, after being relegated losing World Group II Playoffs against Spain. Argentina are currently number 24 in the ITF rankings.
The Belarus women's national tennis team represented Belarus in Billie Jean King Cup tennis competition and are governed by the Belarus Tennis Association. They compete in the World Group. After the 2022 Russia invasion of Ukraine, the International Tennis Federation suspended Russia and Belarus from Billie Jean King Cup competitions.
The Denmark Billie Jean King Cup team represents Denmark in the Billie Jean King Cup tennis competition and are governed by the Dansk Tennis Forbund. They currently compete in the Europe/Africa Zone of Group II. They rank 53rd in the world with 547.50 points.
The Estonia Billie Jean King Cup team represents Estonia in the Billie Jean King Cup tennis competition and are governed by the Estonian Tennis Association.
The Great Britain Billie Jean King Cup team represents the United Kingdom in Fed Cup tennis competition and are governed by the Lawn Tennis Association. In 2020, they lost out on a chance to secure a place at the inaugural Billie Jean King Cup finals, losing to Slovakia 3-1. However, in 2021 they won their play-off against Mexico and will play for another chance to enter the finals in 2022.
The Netherlands Billie Jean King Cup team represents the Netherlands in the Billie Jean King Cup tennis competition and are governed by the Koninklijke Nederlandse Lawn Tennis Bond.
The Switzerland women's national tennis team represents Switzerland in Fed Cup tennis competition and are governed by Swiss Tennis. They currently compete in World Group.
Karen Barritza is a Danish former tennis player.
Keren Shlomo is a retired Israeli tennis player.
Eri Hozumi is a Japanese tennis player.
Dalila Jakupović is a Slovenian tennis player of Bosnian descent.
Sofie Oyen is a Belgian former tennis player.
Mai Grage is a Danish former professional tennis player.
Natalia Vladimirovna Egorova is a retired professional tennis player who represented the Soviet Union and Russia.
The 2020–21 Billie Jean King Cup was the 58th edition of the international women's tennis team's tournament and the first to be styled as the Billie Jean King Cup.
The Europe/Africa Zone is one of three zones of regional competition in the 2020–21 Billie Jean King Cup.
Merete Balling-Stockmann is a Danish former professional tennis player.
Denmark 
