| Singles | |
|---|---|
| 2015 ASB Classic | |
| Champion |  Venus Williams |
| Runner-up |  Caroline Wozniacki |
| Score | 2–6, 6–3, 6–3 |
| Draw | 32 (4 Q / 1 WC ) |
| Seeds | 8 |
Ana Ivanovic was the defending champion, but she chose to participate at the Brisbane International instead.
Venus Williams made her second straight ASB Classic final and won the title, defeating Caroline Wozniacki 2–6, 6–3, 6–3.
Caroline Wozniacki (final)
Sara Errani (first round) Venus Williams (champion)
Barbora Záhlavová-Strýcová (semifinals)
Svetlana Kuznetsova (first round) Sloane Stephens (second round) Coco Vandeweghe (quarterfinals)
Mona Barthel (first round)| Semifinals | Final | ||||||||||||
| 1 | Caroline Wozniacki | 4 | 6 | 6 | |||||||||
| 4 | Barbora Záhlavová-Strýcová | 6 | 3 | 4 | |||||||||
| 1 | Caroline Wozniacki | 6 | 3 | 3 | |||||||||
| 3 | Venus Williams | 2 | 6 | 6 | |||||||||
| 3 | Venus Williams | 6 | 6 | ||||||||||
| Lauren Davis | 0 | 3 | |||||||||||
| First round | Second round | Quarterfinals | Semifinals | ||||||||||||||||||||||||
| 1 | C Wozniacki | 6 | 6 | ||||||||||||||||||||||||
| Q |  J Glushko | 3 | 2 | 1 | C Wozniacki | 6 | 77 | ||||||||||||||||||||
 Y Wickmayer | 5 | 6 | 0 | WC | T Townsend | 1 | 64 | ||||||||||||||||||||
| WC | T Townsend | 7 | 3 | 6 | 1 | C Wozniacki | 6 | 6 | |||||||||||||||||||
| J Görges | 6 | 6 | J Görges | 4 | 4 | ||||||||||||||||||||||
| Q | A Tatishvili | 1 | 4 | J Görges | 6 | 7 | |||||||||||||||||||||
| Q | L Hradecká | 3 | 78 | 6 | Q | L Hradecká | 3 | 5 | |||||||||||||||||||
| 5 | S Kuznetsova | 6 | 66 | 4 | 1 | C Wozniacki | 4 | 6 | 6 | ||||||||||||||||||
| 4 | B Záhlavová-Strýcová | 6 | 3 | 6 | 4 | B Záhlavová-Strýcová | 6 | 3 | 4 | ||||||||||||||||||
 C Scheepers | 1 | 6 | 2 | 4 | B Záhlavová-Strýcová | 6 | 2 | 6 | |||||||||||||||||||
 M Puig | 5 | 6 | 4 |  M Erakovic | 0 | 6 | 4 | ||||||||||||||||||||
| M Erakovic | 7 | 2 | 6 | 4 | B Záhlavová-Strýcová | 6 | 7 | ||||||||||||||||||||
| K Flipkens | 77 | 1 | 77 | 7 | C Vandeweghe | 4 | 5 | ||||||||||||||||||||
 J Larsson | 61 | 6 | 63 | K Flipkens | 1 | 77 | 5 | ||||||||||||||||||||
| R Vinci | 7 | 2 | 3 | 7 | C Vandeweghe | 6 | 65 | 7 | |||||||||||||||||||
| 7 | C Vandeweghe | 5 | 6 | 6 | |||||||||||||||||||||||
| First round | Second round | Quarterfinals | Semifinals | ||||||||||||||||||||||||
| 8 | M Barthel | 2 | 1 | ||||||||||||||||||||||||
 A Konjuh | 6 | 6 | A Konjuh | 3 | 1 | ||||||||||||||||||||||
| E Vesnina | 77 | 6 | E Vesnina | 6 | 6 | ||||||||||||||||||||||
 K Mladenovic | 65 | 2 | E Vesnina | 2 | 4 | ||||||||||||||||||||||
 K Bertens | 3 | 2 | 3 | V Williams | 6 | 6 | |||||||||||||||||||||
 K Nara | 6 | 6 | K Nara | 4 | 1 | ||||||||||||||||||||||
 J Čepelová | 1 | 0 | 3 | V Williams | 6 | 6 | |||||||||||||||||||||
| 3 | V Williams | 6 | 6 | 3 | V Williams | 6 | 6 | ||||||||||||||||||||
| 6 | S Stephens | 6 | 6 | L Davis | 0 | 3 | |||||||||||||||||||||
 S Soler Espinosa | 3 | 1 | 6 | S Stephens | 6 | 4 | 1 | ||||||||||||||||||||
| S Rogers | 6 | 4 | 3 | L Davis | 1 | 6 | 6 | ||||||||||||||||||||
| L Davis | 1 | 6 | 6 | L Davis | 2 | 6 | 6 | ||||||||||||||||||||
| Q |  U Radwańska | 6 | 7 | Q | U Radwańska | 6 | 2 | 1 | |||||||||||||||||||
| F Schiavone | 4 | 5 | Q | U Radwańska | 1 | 6 | 6 | ||||||||||||||||||||
| D Hantuchová | 6 | 6 | D Hantuchová | 6 | 3 | 1 | |||||||||||||||||||||
| 2 | S Errani | 3 | 2 | ||||||||||||||||||||||||
Nicole Gibbs (first round) An-Sophie Mestach (second round) Grace Min (first round) Alison Van Uytvanck (second round)
Yulia Putintseva (first round)
Sharon Fichman (second round) Misa Eguchi (qualifying competition) Laura Siegemund (second round)| First round | Second round | Qualifying competition | ||||||||||||||||||
| 1 | Nicole Gibbs | 2 | 6 | 2 | ||||||||||||||||
 Yuliya Beygelzimer | 6 | 4 | 6 | |||||||||||||||||
| Yuliya Beygelzimer | 2 | 6 | 5 | |||||||||||||||||
 Sesil Karatantcheva | 6 | 3 | 7 | |||||||||||||||||
| Shuko Aoyama | 3 | 3 | ||||||||||||||||||
| Sesil Karatantcheva | 6 | 6 | ||||||||||||||||||
| Sesil Karatantcheva | 2 | 4 | ||||||||||||||||||
| Urszula Radwańska | 6 | 6 | ||||||||||||||||||
 Anett Kontaveit | 5 | 6 | 2 | |||||||||||||||||
| Urszula Radwańska | 7 | 3 | 6 | |||||||||||||||||
| Urszula Radwańska | 6 | 6 | ||||||||||||||||||
| 8 | Laura Siegemund | 1 | 3 | |||||||||||||||||
| WC | Jade Lewis | 2 | 0 | |||||||||||||||||
| 8 | Laura Siegemund | 6 | 6 | |||||||||||||||||
| First round | Second round | Qualifying competition | ||||||||||||||||||
| 2 | An-Sophie Mestach | 6 | 6 | |||||||||||||||||
| WC |  Sacha Jones | 3 | 0 | |||||||||||||||||
| 2 | An-Sophie Mestach | 77 | 0 | 2 | ||||||||||||||||
| Anna Tatishvili | 63 | 6 | 6 | |||||||||||||||||
| Louisa Chirico | 4 | 3 | ||||||||||||||||||
| Anna Tatishvili | 6 | 6 | ||||||||||||||||||
| Anna Tatishvili | 4 | 6 | 6 | |||||||||||||||||
 Mandy Minella | 6 | 0 | 0 | |||||||||||||||||
| Mandy Minella | 3 | 6 | 7 | |||||||||||||||||
| Barbora Krejčíková | 6 | 3 | 5 | |||||||||||||||||
| Mandy Minella | 77 | 6 | ||||||||||||||||||
| 6 | Sharon Fichman | 63 | 3 | |||||||||||||||||
| Andrea Hlaváčková | 3 | 6 | 3 | |||||||||||||||||
| 6 | Sharon Fichman | 6 | 3 | 6 | ||||||||||||||||
| First round | Second round | Qualifying competition | ||||||||||||||||||
| 3 | Grace Min | 1 | 2 | |||||||||||||||||
| Petra Martić | 6 | 6 | ||||||||||||||||||
| Petra Martić | 61 | 6 | 4 | |||||||||||||||||
| Claire Feuerstein | 77 | 2 | 6 | |||||||||||||||||
 Ons Jabeur | 3 | 3 | ||||||||||||||||||
| Claire Feuerstein | 6 | 6 | ||||||||||||||||||
| Claire Feuerstein | 1r | |||||||||||||||||||
| Julia Glushko | 4 | |||||||||||||||||||
 Naomi Broady | 1 | 4 | ||||||||||||||||||
| Kateryna Kozlova | 6 | 6 | ||||||||||||||||||
| Kateryna Kozlova | 3 | 4 | ||||||||||||||||||
| Julia Glushko | 6 | 6 | ||||||||||||||||||
| Julia Glushko | 6 | 6 | ||||||||||||||||||
| 5 | Yulia Putintseva | 1 | 3 | |||||||||||||||||
| First round | Second round | Qualifying competition | ||||||||||||||||||
| 4 | Alison Van Uytvanck | 79 | 78 | |||||||||||||||||
| Renata Voráčová | 67 | 66 | ||||||||||||||||||
| 4 | Alison Van Uytvanck | 6 | 3 | 5 | ||||||||||||||||
| Lucie Hradecká | 2 | 6 | 7 | |||||||||||||||||
| WC | Katherine Westbury | 77 | 2 | 2 | ||||||||||||||||
| Lucie Hradecká | 65 | 6 | 6 | |||||||||||||||||
| Lucie Hradecká | 6 | 1 | 77 | |||||||||||||||||
| 7 | Misa Eguchi | 3 | 6 | 64 | ||||||||||||||||
| PR | Alexa Glatch | 6 | 6 | |||||||||||||||||
 María Irigoyen | 2 | 3 | ||||||||||||||||||
| PR | Alexa Glatch | 6 | 5 | 4 | ||||||||||||||||
| 7 | Misa Eguchi | 3 | 7 | 6 | ||||||||||||||||
| WC | Rosie Cheng | 5 | 4 | |||||||||||||||||
| 7 | Misa Eguchi | 7 | 6 | |||||||||||||||||
Dinara Safina defeated Svetlana Kuznetsova in the final, 6–3, 6–2 to win the women's singles tennis title at the 2009 Italian Open.
Dinara Safina defeated Caroline Wozniacki in the final, 6–2, 6–4 to win the inaugural women's singles tennis title at the 2009 Madrid Open.
Aravane Rezaï defeated Venus Williams in the final, 6–2, 7–5 to win the women's singles tennis title at the 2010 Madrid Open.
Caroline Wozniacki defeated Vera Zvonareva in the final, 6–3, 6–2 to win the women's singles tennis title at the 2010 Canadian Open.
Caroline Wozniacki defeated Svetlana Kuznetsova in the final, 6–1, 6–3 to win the women's singles tennis title at the 2011 Dubai Tennis Championships. Although Wozniacki had lost the world No. 1 singles ranking to Kim Clijsters the previous week, she reclaimed the spot by defeating Shahar Pe'er in the quarterfinals.
Serena Williams was the defending champion, and successfully defended her title, defeating Jelena Janković in the final 3–6, 6–0, 6–2.
Serena Williams defeated Jelena Janković in the final, 6–2, 6–2 to win the women's singles tennis title at the 2013 China Open.
Venus Williams was the defending champion, but decided not to participate.
Caroline Wozniacki won the title, defeating Annika Beck in the final, 6–2, 6–2.
Two-time defending champion Serena Williams defeated Caroline Wozniacki in the final, 6–3, 6–3 to win the women's singles tennis title at the 2014 US Open. It was her Open Era-record-equaling sixth US Open singles title and 18th major singles title overall, equaling Martina Navratilova and Chris Evert's tally. She did not lose a set during the tournament for a record-equaling third time, and did not lose more than three games in any set.
Maria Sharapova defeated Petra Kvitová in the final, 6–4, 2–6, 6–3 to win the women's singles tennis title at the 2014 China Open.
Venus Williams was the defending champion, but lost in the first round to Daria Kasatkina.
Jelena Janković was the defending champion, but lost in the semifinals to Caroline Wozniacki.
Sloane Stephens was the defending champion, but withdrew before the tournament began.
Elina Svitolina defeated Caroline Wozniacki in the final, 6–4, 6–0 to win the women's singles tennis title at the 2017 Canadian Open. It was her third consecutive Premier 5 title, making her the first woman to win the first three Premier 5 tournaments in a season, as well as the first to win three consecutive Premier 5 tournaments since Wozniacki won Montreal and Tokyo in 2010 and Dubai in 2011. This was also Wozniacki's sixth consecutive loss in a final in 2017, making her the first to lose that many finals in a row in one season, as well as the first woman to lose six finals in a single season since Maria Sharapova in 2012.
Caroline Wozniacki was the defending champion, but withdrew before her second round match.
Caroline Wozniacki defeated Venus Williams in the final, 6–4, 6–4 to win the singles tennis title at the 2017 WTA Finals. Williams became the oldest player to reach the final. Wozniacki also ended a seven-match losing streak to Williams with the win.
Caroline Wozniacki defeated Simona Halep in the final, 7–6(7–2), 3–6, 6–4 to win the women's singles tennis title at the 2018 Australian Open. She became the first Dane to win a major singles title. With the win, Wozniacki also regained the world No. 1 singles ranking for the first time since 2012. She saved two match points en route to the title, in the second round against Jana Fett; Halep also saved match points to reach the final, saving three against Lauren Davis in the third round and two against Angelique Kerber in the semifinals. It was Halep's third runner-up finish in as many major finals, though she would win the French Open a few months later. In addition to Wozniacki and Halep, Garbiñe Muguruza, Elina Svitolina, Karolína Plíšková and Jeļena Ostapenko were in contention for the world No. 1 ranking.
Naomi Osaka defeated Daria Kasatkina in the final, 6–3, 6–2 to win the women's singles tennis title at the 2018 Indian Wells Masters. It was her first WTA Tour title. This was the first time two players under 21 had contested the final since Kim Clijsters and Serena Williams in 2001. At 20 years old, Osaka was the youngest Indian Wells Masters champion since Ana Ivanovic in 2008, and the youngest at any Premier Mandatory event since Caroline Wozniacki at the 2010 China Open. She was also only the third unseeded player to win the tournament after Serena Williams (1999) and Clijsters (2005), and the first Japanese player to win a Premier Mandatory title.
Petra Kvitová defeated Kiki Bertens in the final, 7–6(8–6), 4–6, 6–3 to win the women's singles tennis title at the 2018 Madrid Open. It was Kvitová's third Madrid Open title, and she became the first player to win three women's singles titles at the Madrid Open.
Defending champion Elina Svitolina defeated Simona Halep in a rematch of the previous year's final, 6–0, 6–4 to win the women's singles tennis title at the 2018 Italian Open.