Sara Errani was the defending champion, but withdrew before the tournament due to an adductor problem.
Petra Kvitová was the defending champion but failed to qualify this year.
Ekaterina Makarova and Elena Vesnina were the defending champions, but Vesnina was unable to compete due to an injury. Makarova played alongside Vera Zvonareva, but lost in the second round to Elise Mertens and Demi Schuurs.
Ashleigh Barty and Casey Dellacqua were the defending champions, but Dellacqua retired from professional tennis in February 2018. Barty played alongside CoCo Vandeweghe, but lost in the first round to Tímea Babos and Kristina Mladenovic.
Elise Mertens and Aryna Sabalenka defeated Barbora Krejčíková and Kateřina Siniaková in the final, 6–3, 6–2, to win the women's doubles tennis title at the 2019 Indian Wells Masters.
Ekaterina Makarova and Elena Vesnina were the defending champions, but chose not to participate this year.
Ashleigh Barty and Demi Schuurs were the defending champions, but chose not to participate together. Barty played alongside Victoria Azarenka and successfully defended the title, defeating Schuurs and Anna-Lena Grönefeld in the final, 4–6, 6–0, [10–3].
Barbora Krejčíková and Kateřina Siniaková were the defending champions, but lost in the first round to Nadiia Kichenok and Abigail Spears.
Barbora Krejčíková and Kateřina Siniaková were the defending champions, but lost in the semifinals to Gabriela Dabrowski and Xu Yifan.
Elise Mertens and Aryna Sabalenka defeated Ashleigh Barty and Victoria Azarenka in the final, 7–5, 7–5, to win the women's doubles tennis title at the 2019 US Open.
Elise Mertens and Demi Schuurs were the defending champions, but chose not to participate together. Schuurs teamed up with Anna-Lena Grönefeld, but lost in the semifinals to Mertens and Aryna Sabalenka.
Andrea Sestini Hlaváčková and Barbora Strýcová were the defending champions, but Sestini Hlaváčková did not participate due to maternity leave. Strýcová played alongside Hsieh Su-wei, but lost in the second round to Jeļena Ostapenko and Dayana Yastremska.
Tímea Babos and Kristina Mladenovic were the defending champions and successfully defended their title, defeating Hsieh Su-wei and Barbora Strýcová in the final, 6–1, 6–3. This was Babos’ third straight WTA Finals title in doubles.
Tímea Babos and Kristina Mladenovic won their second Australian Open title, defeating Hsieh Su-wei and Barbora Strýcová in the final, 6–2, 6–1. Despite the loss, Hsieh regained the WTA no. 1 doubles ranking for the first time since 2014, replacing her partner Strýcová. Mladenovic, Aryna Sabalenka and Xu Yifan were also in contention for the top ranking at the start of the tournament.
Barbora Krejčíková and Rajeev Ram were the defending champions, but Ram chose not to participate. Krejčíková played alongside Nikola Mektić, and successfully defended the title, defeating Bethanie Mattek-Sands and Jamie Murray in the final 5–7, 6–4, [10–1].
The Gippsland Trophy is a new addition to the WTA Tour in 2021.
Elise Mertens and Aryna Sabalenka defeated Barbora Krejčíková and Kateřina Siniaková in the final, 6–2, 6–3, to win the women's doubles tennis title at the 2021 Australian Open. This was Mertens and Sabalenka's second Grand Slam doubles title as a team after they first won the 2019 US Open. By virtue of winning the title, Sabalenka claimed the world No. 1 doubles ranking.
Květa Peschke and Demi Schuurs were the defending champions, but chose to compete with different partners. Peschke partnered Ellen Perez, and Schuurs partnered Nicole Melichar. Both teams lost to Samantha Stosur and Zhang Shuai; Perez and Peschke did so in the second round, whilst Melichar and Schuurs lost in the quarterfinals.
Samantha Stosur and Zhang Shuai defeated Coco Gauff and Caty McNally in the final, 6–3, 3–6, 6–3 to win the women's doubles title at the 2021 US Open. This was Stosur's fourth major title in women's doubles and eighth major overall, as well as Zhang's second major title; this was the pair's second major title, after their victory at the 2019 Australian Open. This was the first major final that either Gauff or McNally participated in.
Barbora Krejčíková and Kateřina Siniaková defeated Anna Danilina and Beatriz Haddad Maia in the final, 6–7(3–7), 6–4, 6–4 to win the women's doubles tennis title at the 2022 Australian Open. This was the pair's fourth major doubles title.
Elise Mertens 
Aryna Sabalenka 
Samantha Stosur 
Zhang Shuai 
