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 Chairperson is Katrina Adams.
Ulrikke Pia Eikeri is a Norwegian tennis player.
Kateryna Baindl is a Ukrainian professional tennis player. On 19 February 2018, she achieved a career-high singles ranking of world No. 62. On 22 October 2012, she peaked at No. 139 in the doubles rankings. Up to date, Kozlova has won one singles title on the WTA Challenger Tour as well as five singles and 13 doubles titles on the ITF Circuit.
Lara Arruabarrena Vecino is a former professional tennis player from Spain. On 3 July 2017, she reached a career-high WTA singles ranking of 52, and her best doubles ranking is world No. 28, set on 22 February 2016. Arruabarrena retired from professional tour in August 2022.
Marcela Zacarías Valle is a Mexican professional tennis player. She has a career-high singles ranking of world No. 159, and a best doubles ranking of world No. 119, achieved on 24 October 2022.
Laura Pigossi Herrmann de Andrade is a Brazilian professional tennis player. She won a bronze medal at the 2020 Tokyo Olympics, playing alongside Luisa Stefani.
Despina Papamichail is a Greek professional tennis player. She has a career-high singles ranking of world No. 147, reached on 20 June 2022. Her highest doubles ranking is No. 109, achieved on 18 September 2023. Papamichail has won one doubles title on the WTA Challenger Tour as well as 15 singles and 36 doubles titles on the ITF Women's Circuit.
Risa Ozaki is a former professional Japanese tennis player.
Wang Yafan is a Chinese tennis player.
Iryna Uladzimiraŭna Shymanovich is a Belarusian tennis player.
Nao Hibino is a Japanese professional tennis player. She has been ranked as high as No. 56 in singles and No. 43 in doubles by the Women's Tennis Association (WTA). Hibino has won three singles and three doubles titles on the WTA Tour. Along with that, she has won eight singles and ten doubles tournaments on the ITF Women's World Tennis Tour.
Vera Valeryevna Lapko is a Belarusian professional tennis player.
Fanny Stollár is a Hungarian tennis player.
Tamara Zidanšek is a Slovenian professional tennis player. She has career-high WTA rankings of No. 22 in singles and No. 47 in doubles, and has won one singles title and four doubles titles on the WTA Tour and three WTA Challenger singles titles, along with 17 singles titles and four doubles titles on the ITF Circuit. On the ITF Junior Circuit, she was in the top 20 and reached a career-high ranking of No. 16, achieved in December 2015. Playing for the Slovenia Fed Cup team, she has a win–loss record of 11–9.
Fernanda Contreras Gómez is a Mexican tennis player. She has a career-high singles ranking of world No. 139 by the WTA, achieved on 3 October 2022, and a doubles ranking of 99, achieved on 8 May 2023. She played collegiately for Vanderbilt University.
Moyuka Uchijima is a Japanese tennis player.
Natalija Stevanović is a Serbian tennis player.
Mai Hontama (本玉真唯) is a Japanese tennis player. Hontama has a career-high singles ranking by the WTA of 120, achieved March 2022. She also has a career-high doubles ranking of world No. 124, set on 28 August 2023. She is currently the No. 2 Japanese player.
Himeno Sakatsume is a Japanese tennis player.
Trinidad and Tobago 
