The Romania Billie Jean King Cup team represents Romania in Billie Jean King Cup tennis competition. It is governed by the Federația Română de Tenis and currently competes in the World Group I, the highest level of the competition.
Mariya Koryttseva and Raluca Olaru were the defending champions but Olaru decided not to participate.
Koryttseva played alongside Darija Jurak but lost in the quarterfinals to Gisela Dulko and Paola Suárez.
Sara Errani and Roberta Vinci defeated Lourdes Domínguez Lino and Arantxa Parra Santonja 6–2, 6–1 in the final to win the title.
Irina-Camelia Begu and Elena Bogdan were the defending champions, but they did not partner up together. Begu partnered up with Alizé Cornet and successfully defended her title defeating Elena Bogdan and Raluca Olaru in the final 6–2, 6–0.
Anna-Lena Grönefeld and Květa Peschke were the defending champions, but chose not to participate.
Karolína Plíšková and Kristýna Plíšková won the title, defeating Gabriela Dabrowski and Alicja Rosolska in the final, 7–6(8–6), 6–4.
Chan Chin-wei and Xu Yifan were the defending champions but Xu chose to participate at Guangzhou instead. Chan partnered Hsu Chieh-yu, but lost in the semifinals to Mona Barthel and Mandy Minella.
Michaëlla Krajicek and Karolína Plíšková were the defending champions, but chose not to participate this year.
Chan Hao-ching and Anabel Medina Garrigues won the title, defeating Lara Arruabarrena and Raluca Olaru in the final, 6–4, 7–6(7–5).
Lara Arruabarrena and Irina-Camelia Begu were the defending champions but chose not to participate together. Begu teamed up with Raluca Olaru but lost in the semifinals to Kiki Bertens and Johanna Larsson.
Arruabarrena successfully defended the title alongside Andreja Klepač, defeating Kiki Bertens and Johanna Larsson in the final, 2–6, 6–3, [10–6].
Bethanie Mattek-Sands and Lucie Šafářová were the defending champions, but Šafářová withdrew before the tournament due to a bacterial infection. Mattek-Sands played alongside Sabine Lisicki, but lost in the second round to Anastasia and Arina Rodionova.
Jessica Moore and Varatchaya Wongteanchai were the defending champions, but chose not to compete together. Moore played alongside Prarthana Thombare, but lost in the quarterfinals to Irina-Camelia Begu and Raluca Olaru. Wongteanchai teamed up with Alona Fomina, but lost in the first round to Jaqueline Cristian and Cristina Dinu.
Simona Halep was the defending champion, but lost in the semifinals to Elina Svitolina.
Agnieszka Radwańska was the defending champion, but lost in the semifinals to Daria Gavrilova.
Lara Arruabarrena was the defending champion, but lost in the first round to Ekaterina Alexandrova.
Andrea Sestini Hlaváčková and Peng Shuai were the defending champions, but Sestini Hlaváčková chose to compete in Brisbane instead and Peng chose not to participate this year.
Kristina Mladenovic was the defending champion, but lost in the final to unseeded Petra Kvitová, 1–6, 2–6. As a result, Kvitová became the first left-handed player to win a singles title in Russia. She was also the first wildcard to win the event.
Irina-Camelia Begu and Raluca Olaru were the defending champions, but chose not to participate together. Olaru played alongside Mihaela Buzărnescu, but lost in the semifinals to Danka Kovinić and Maryna Zanevska. Begu teamed up with Andreea Mitu and successfully defended the title, defeating Kovinić and Zanevska in the final, 6–3, 6–4.
Tímea Babos and Andrea Sestini Hlaváčková were the defending champions, but they chose to compete alongside different partners in Wuhan instead.
This was the first edition of the tournament.
Anna Kalinskaya and Viktória Kužmová were the defending champions, but chose not to participate.
The 2021 WTA Romanian Open, known as the Winners Open due to sponsorship reasons, was a professional women's tennis tournament played on outdoor clay courts at the Winners Sports Club. It was the 1st edition of the tournament held in the city of Cluj-Napoca and was a part of the 2021 WTA Tour.
Veronika Kudermetova and Anastasia Pavlyuchenkova defeated reigning champion Giuliana Olmos and partner Gabriela Dabrowski in the final, 1–6, 6–4, [10–7] to win the women's doubles tennis title at the 2022 Italian Open.
Viktória Kužmová 
Kristýna Plíšková 
Jaqueline Cristian 
