Nadia Petrova defeated the defending champion Agnieszka Radwańska in the final, 6–0, 1–6, 6–3 to win the singles tennis title at the 2012 Pan Pacific Open.
Sara Errani was the defending champion and she retained her title, beating Carla Suárez Navarro in the final, 6–0, 6–4.
Kiki Bertens was the defending champion, but lost in the quarterfinals to Lourdes Domínguez Lino.
Francesca Schiavone won the title, defeating Domínguez Lino in the final, 6–1, 6–3.
Alizé Cornet was the defending champion, but withdrew before the tournament began.
Yvonne Meusburger defeated Andrea Hlaváčková 7–5, 6–2 in the final for her first WTA title.
Hsieh Su-wei was the defending champion, but lost in the second round to Zhang Shuai.
Magdaléna Rybáriková was the two-time defending champion, but lost to Ekaterina Makarova in the first round.
Venus Williams was the defending champion, but lost in the first round to Daria Kasatkina.
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.
Alizé Cornet was the defending champion, but withdrew before the tournament began due to a back injury.
Johanna Konta defeated Caroline Wozniacki in the final, 6–4, 6–3 to win the women's singles tennis title at the 2017 Miami Open.
Daria Kasatkina was the defending champion, but lost in the quarterfinals to Julia Görges.
Karolína Plíšková was the defending champion, but lost in the quarterfinals to Aryna Sabalenka.
The singles competition of the 2018 Ladies Championship Gstaad tennis tournament was held in Gstaad, Switzerland from 16-22 July 2018. Kiki Bertens was the defending champion, but withdrew before the tournament began.
Kiki Bertens defeated Simona Halep in the final, 2–6, 7–6(8–6), 6–2 to win the women's singles tennis title at the 2018 Cincinnati Masters. En route to her first hard court & Premier 5-level title, Bertens defeated the world No. 2 & No. 1 players, in the second round and final, respectively. She became the first Dutchwoman to win the title.
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.
Alizé Cornet was the defending champion, but lost in the final. Fiona Ferro won her first career WTA Tour singles title, defeating Cornet in the final, 6–1, 2–6, 6–1.
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.
Kiki Bertens was the defending champion and successfully defended her title, defeating Elena Rybakina in the final, 6–1, 6–3. This would be Bertens' final WTA Tour singles title before her retirement in July 2021.
Veronika Kudermetova defeated Danka Kovinić in the final, 6–4, 6–2, to win the singles tennis title at the 2021 Charleston Open. Kudermetova did not drop a set en route to her first career Women's Tennis Association (WTA) singles title.
Alizé Cornet 
Eugenie Bouchard 
