Lu Jingjing was the defending champion, but lost to the 3rd seeded Tetiana Luzhanska in the first round.
Jelena Janković was the defending champion, but chose to participate in Florianópolis instead.
Agnieszka Radwańska was the defending champion, but withdrew before her quarterfinal match with a right thigh injury.
Venus Williams was the defending champion, but chose to compete in St. Petersburg instead.
Elitsa Kostova was the defending champion from the event's previous edition as an ITF Women's Circuit tournament, but lost in the first round of qualifying to Barbora Štefková.
Duan Yingying was the defending champion, but lost in the first round to Arina Rodionova.
Lesia Tsurenko was the defending champion, but lost in the first round to Aleksandra Krunić.
Kristýna Plíšková was the defending champion, but lost in the second round to Kurumi Nara.
Peng Shuai was the defending champion, but lost in the semifinals to Maria Sharapova.
Elina Svitolina was the defending champion from the last time the event was held at Pune in 2012, but chose not to participate this year.
The 2018 Taiwan Open was a women's tennis tournament played on indoor hard courts. It was the third edition of the event and part of the WTA International tournaments of the 2018 WTA Tour.
Tímea Babos was the defending champion, but lost in the second round to Mona Barthel.
Anastasia Pavlyuchenkova was the defending champion, but withdrew before the tournament began.
Francesca Schiavone was the defending champion, but withdrew before the tournament began.
Elina Svitolina was the defending champion, but chose to compete in Stuttgart instead.
Peng Shuai was the defending champion, but withdrew before the tournament began.
Madison Keys was the defending champion, but withdrew due to a wrist injury.
Zhang Shuai was the defending champion, but she withdrew before her first round match against Wang Yafan.
Elise Mertens was the defending champion, but lost in the second round to Yulia Putintseva.
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.
Tímea Babos 
Kateryna Kozlova 
