Lucie Šafářová defeated Victoria Azarenka in the final, 6–4, 6–3 to win the singles tennis title at the 2015 WTA Qatar Open.
Madison Keys was the defending champion, but lost in the second round to Belinda Bencic.
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.
This is the first edition of the tournament.
Caroline Garcia was the defending champion, but lost in the semifinals to Daria Gavrilova.
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.
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.
Bianca Andreescu defeated Angelique Kerber in the final, 6–4, 3–6, 6–4 to win the women's singles tennis title at the 2019 Indian Wells Open. It was her first WTA Tour title, and Andreescu became the first wildcard champion in the tournament's history, as well as the youngest champion since Serena Williams in 1999. This marked the second consecutive year where a player won the tournament as her first WTA Tour singles title.
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.
Romina Oprandi was the defending champion, having won the last edition in 2012 as an ITF tournament, but chose not to participate.
This was the first edition of the event.
Simona Halep defeated Elena Rybakina in the final, 3–6, 6–3, 7–6(7–5) to win the women's singles tennis title at the 2020 Dubai Tennis Championships. Halep saved a match point en route to the title, against Ons Jabeur in the second round.
Aryna Sabalenka defeated Petra Kvitová in the final, 6–3, 6–3 to win the singles tennis title at the 2020 WTA Qatar Open.
Ashleigh Barty defeated Jil Teichmann in the final, 6–3, 6–1 to win the women's singles tennis title at the 2021 Cincinnati Masters. Barty did not drop a set en route to her first Cincinnati Masters title. It was her fifth and last title of the season, her third WTA 1000 title, and her 13th career WTA Tour singles title.
Ons Jabeur defeated Jessica Pegula in the final, 7–5, 0–6, 6–2 to win the women's singles tennis title at the 2022 Madrid Open. It was her first WTA 1000 title, and she became the first Arab and African woman to win a WTA 1000 title.
Simona Halep defeated Beatriz Haddad Maia in the final, 6–3, 2–6, 6–3 to win the women's singles tennis title at the 2022 Canadian Open. Halep's third Canadian Open title marked the first time in her career she won an event on three occasions and also earned her a ninth WTA 1000 title. Haddad Maia was the first Brazilian to reach beyond the quarterfinals and contest the final at a WTA 1000 tournament.
Belinda Bencic defeated Daria Kasatkina in the final, 6–0, 6–2 to win the women's singles tennis title at the 2023 Adelaide International 2.
Coco Gauff defeated Karolína Muchová in the final, 6–3, 6–4 to win the women's singles tennis title at the 2023 Cincinnati Open. It was her first WTA 1000 title and the first WTA 1000 final appearances for both Gauff and Muchová. Gauff became the youngest champion in Cincinnati history. By reaching the final, Muchová debuted in the top ten of the WTA rankings.
Aryna Sabalenka 
Carla Suárez Navarro 
