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.
Margit Rüütel is a former tennis player from Estonia.
The Czech Republic women's national tennis team is the representative national team of the Czech Republic in Billie Jean King Cup competition. The Czech Republic team in its current incarnation began competing in 1993. It is seen as the primary successor to the Czechoslovak team, and not Slovakia, even though the Czechoslovak team included both Czech and Slovak players.
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 Russian invasion of Ukraine, the International Tennis Federation suspended Russia and Belarus from Billie Jean King Cup competitions.
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 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.
Ema Burgić is a Bosnian-born American professional tennis player.
Maryna Volodymyrivna Zanevska is a Ukrainian-born Belgian former professional tennis player. She has a career-high singles ranking of world No. 62, achieved on 23 May 2022, and a WTA doubles ranking of 86, reached on 16 June 2014. Zanevska won one WTA Tour singles title and one title in singles and one in doubles on the WTA Challenger Tour. She also reached four WTA Tour doubles finals. On 8 August 2023, she announced she was "saying goodbye to tennis for now" due to back pain. Her final tournament was the 2023 US Open.
Valeria Volodymyrivna Bondarenko is a Ukrainian former tennis player, the older sister of tennis players Alona and Kateryna Bondarenko.
Mailen Auroux is a retired tennis player from Argentina.
Sofia Shapatava is a Georgian tennis player.
Varatchaya "Pias" Wongteanchai is a former professional tennis player from Thailand.
Valeria Patiuk is an Israeli former tennis player.
Julia Skripnik is a retired Estonian tennis player.
Eva Paalma is a retired Estonian tennis player.
Abigail Agivanagi Tere-Apisah is a former professional tennis player from Papua New Guinea.
Rebecca Šramková is a Slovak tennis player. She has a career-high singles ranking of world No. 43, achieved on 4 November 2024, and a best doubles ranking of No. 364, reached on 24 May 2021.. With the Slovakia team, she contributed to achieve for the first time the final for her country at 2024 Billie Jean King Cup, losing only in the final to world n.4 Jasmine Paolini. She has won one WTA Tour singles title in Hua Hin, Thailand. On the ITF Women's Circuit, she has won 13 singles titles and four doubles titles.
Elena Malõgina is an Estonian tennis player.
Saara Orav is an inactive Estonian tennis player.
The 30th Europe/Africa Zone is one of three zones of regional competition in the 2022 Billie Jean King Cup.
Estonia 
