Maria Sharapova was the defending champion, but withdrew due to right shoulder injury.
Li Na was the defending champion, but lost the final against Victoria Azarenka, 6–2, 1–6, 6–3.
Caroline Wozniacki was the defending champion, but was not allowed to participate because there were already two top 6 players in the draw.
Victoria Azarenka was the defending champion, but withdrew before her quarterfinal match against Caroline Wozniacki.
Agnieszka Radwańska was the defending champion, but lost 6–0, 6–3 in the semifinals to the eventual champion Serena Williams.
Maria Sharapova was the two-time defending champion, but withdrew in the quarterfinals due to illness.
Serena Williams successfully defended her title by defeating Maria Sharapova in the final, 6–1, 6–4.
Li Na was the defending women's singles tournament champion, but lost to Serena Williams in the semifinals.
Caroline Wozniacki was the defending champion, but she chose not to participate this year.
Agnieszka Radwańska won the title, defeating Anastasia Pavlyuchenkova in the final, 6-7(6-8), 6-3, 6-4
Serena Williams successfully defended her title, beating Sara Errani in the final, 6–3, 6–0.
This was the first edition of the tournament.
Serena Williams was the defending champion, but withdrew before her quarterfinal match with a knee injury.
Venus Williams was the defending champion, but lost in the third round to Lucie Šafářová.
Serena Williams was the two-time defending champion and successfully defended her title, beating Carla Suárez Navarro in the final, 6–2, 6–0. Williams won the title for the record 8th time in her career. This is also the second to last WTA tournament played by Nicole Vaidišová, who received a wildcard and lost to Simona Halep in the second round.
Maria Sharapova was the defending champion but lost to Svetlana Kuznetsova in the semifinals.
Ana Ivanovic was the defending champion, but she lost in the quarterfinals to Dominika Cibulková.
Lucie Šafářová was the defending champion, but lost to Çağla Büyükakçay in the second round.
Agnieszka Radwańska was the defending champion, but lost in the quarterfinals to Alison Riske.
Peng Shuai was the defending champion, but lost in the semifinals to Maria Sharapova.
Anastasija Sevastova was the defending champion, but lost in the final to Tatjana Maria, 4–6, 5–7. This was Maria's first WTA title.
Agnieszka Radwańska 
Alison Riske 
