Caroline Wozniacki defeated Marion Bartoli in the final, 6–1, 2–6, 6–3 to win the women's singles tennis title at the 2011 Indian Wells Masters.
Andrea Petkovic was the defending champion, but did not participate because of an ankle injury.
Sabine Lisicki was the defending champion but was defeated in the second round by Urszula Radwańska.
Serena Williams was the defending champion, and successfully defended her title, defeating Jelena Janković in the final 3–6, 6–0, 6–2.
This was the first edition of Hong Kong Tennis Open.
Carla Suárez Navarro defeated Jeļena Ostapenko in the final, 1–6, 6–4, 6–4 to win the singles tennis title at the 2016 WTA Qatar Open.
Victoria Azarenka defeated Serena Williams in the final, 6–4, 6–4 to win the women's singles tennis title at the 2016 Indian Wells Masters.
Victoria Azarenka defeated Svetlana Kuznetsova in the final, 6–3, 6–2 to win the women's singles tennis title at the 2016 Miami Open. She became the first woman since Kim Clijsters in 2005 to win Indian Wells and Miami back to back, and became only the third woman in history, after Steffi Graf and Clijsters, to complete the 'Sunshine Double' in singles.
Karolína Plíšková defeated Angelique Kerber in the final, 6–3, 6–1 to win the women's singles tennis title at the 2016 Cincinnati Masters. It was her sixth WTA Tour singles title.The two would play each other three weeks later, in the final of the US Open; Kerber would avenge her loss by beating Plíšková in three sets.
The 2016 Japan Women's Open was a women's tennis tournament played on outdoor hard courts. It was the eighth edition of the Japan Women's Open, and part of the WTA International tournaments of the 2016 WTA Tour. It was held at the Ariake Coliseum in Tokyo, Japan, from September 12 through September 18, 2016.
Zheng Saisai was the defending champion, but chose not to participate.
Elena Vesnina defeated Svetlana Kuznetsova in the final, 6–7(6–8), 7–5, 6–4 to win the women's singles tennis title at the 2017 Indian Wells Masters.
Ashleigh Barty defeated Karolína Plíšková in the final, 7–6(7–1), 6–3 to win the women's singles tennis title at the 2019 Miami Open. It was Barty's first WTA Premier Mandatory title. She entered the top 10 in the WTA rankings for the first time with the win.
Kiki Bertens defeated Simona Halep in the final, 6–4, 6–4 to win the women's singles tennis title at the 2019 Madrid Open. She became the first player to win the title without losing a set en route.
Karolína Plíšková defeated Johanna Konta in the final, 6–3, 6–4 to win the women's singles tennis title at the 2019 Italian Open.
Bianca Andreescu won the women's singles tennis title at the 2019 Canadian Open after Serena Williams retired in the final due to back spasms, with the scoreline at 3–1. Andreescu became the first Canadian to win the event since Faye Urban in 1969.
Madison Keys defeated Svetlana Kuznetsova in the final, 7–5, 7–6(7–5) to win the women's singles tennis title at the 2019 Cincinnati Masters.
Karolína Plíšková was the defending champion, but chose to participate in Korea Open, instead.
Aryna Sabalenka was the defending champion, but lost in the second round to Kristýna Plíšková.
Wang Qiang (qualified)
Nicole Gibbs (qualified)
Naomi Broady (first round)
Sesil Karatantcheva (first round)
Anastasija Sevastova (qualified)
Francesca Schiavone (second round)
Kristýna Plíšková (qualified)
Stefanie Vögele (second round)
Pauline Parmentier (first round)
Elena Vesnina (first round)
Patricia Maria Țig (first round)
María Teresa Torró Flor (first round)
Tamira Paszek (qualified)
Julia Glushko (qualifying competition)
Çağla Büyükakçay (first round)
Rebecca Peterson (first round)
Chang Kai-chen (second round)
Richèl Hogenkamp (qualifying competition)
Marina Erakovic (first round)
