Daria Gavrilova was the defending champion, but lost to Aryna Sabalenka in the second round.
Aryna Sabalenka defeated Anett Kontaveit in the final, 6–3, 6–3 to win the singles tennis title at the 2018 Wuhan Open.
Caroline Wozniacki defeated Anastasija Sevastova in the final, 6–3, 6–3 to win the women's singles tennis title at the 2018 China Open. It was Wozniacki's 30th and final WTA Tour title, before her retirement in January 2020.
Angelique Kerber was the defending champion, but lost to Petra Kvitová in the quarterfinals.
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.
Petra Kvitová was the two-time defending champion, but withdrew with an arm injury before the tournament began.
Caroline Wozniacki was the defending champion, but lost in the third round to Aryna Sabalenka in a rematch of the previous year's final.
The 2019 Western & Southern Open was a men's and women's tennis tournament played on outdoor hard courts from August 12–18, 2019. It was a Masters 1000 tournament on the 2019 ATP Tour and a WTA Premier 5 tournament on the 2019 WTA Tour. The tournament was one of two headline events in the 2019 US Open Series. The 2019 tournament was the 118th men's edition and the 91st women's edition of the Cincinnati Masters and took place at the Lindner Family Tennis Center in Mason, Ohio, a northern suburb of Cincinnati, in the United States.
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.
Defending champion Aryna Sabalenka defeated Alison Riske in the final, 6–3, 3–6, 6–1 to win the singles tennis title at the 2019 Wuhan Open.
Defending champion Ashleigh Barty won the women's singles tennis title at the 2021 Miami Open after Bianca Andreescu retired from the final with the scoreline at 6–3, 4–0. Barty saved a match point en route to the title, in the second round against Kristína Kučová.
Aryna Sabalenka defeated Ashleigh Barty in the final, 6–0, 3–6, 6–4 to win the women's singles tennis title at the 2021 Madrid Open. It was her 10th career WTA Tour singles title, and her first on clay.
Iga Świątek defeated Karolína Plíšková in the final, 6–0, 6–0 to win the women's singles tennis title at the 2021 Italian Open. It was her first WTA 1000 singles title, and the 13 points Świątek lost in the championship match is the fewest on record in a WTA 1000-level final. This was the first WTA Tour singles final to be resolved with a 'double bagel' scoreline since Simona Halep defeated Anastasija Sevastova at the 2016 Bucharest Open, and was just the tenth such final in WTA Tour history. With the win, Świątek broke into the top 10 of the WTA rankings for the first time. Both finalists saved match points in prior rounds – Świątek saved two match points in her third round match against Barbora Krejčíková, whilst Plíšková saved three match points in her quarterfinal match against Jeļena Ostapenko.
Ashleigh Barty defeated Karolína Plíšková in the final, 6–3, 6–7(4–7), 6–3 to win the ladies' singles tennis title at the 2021 Wimbledon Championships. She became the first Australian to win the title since Evonne Goolagong Cawley in 1980, the first top seed to win the title since Serena Williams in 2016 and the first to do so at any major since Simona Halep at the 2018 French Open. Barty's victory made her the fourth player, following Ann Jones, Martina Hingis and Amélie Mauresmo, to win the women's singles title after previously winning the girls' singles title. She retained the WTA No. 1 singles ranking by reaching the semifinals, with Aryna Sabalenka having also been in contention for the top ranking.
Iga Świątek defeated Maria Sakkari in the final, 6–4, 6–1 to win the women's singles tennis title at the 2022 Indian Wells Masters. She became the first Pole to win the title.
Iga Świątek defeated Naomi Osaka in the final, 6–4, 6–0 to win the women's singles tennis title at the 2022 Miami Open. She became the fourth woman in history to complete the Sunshine Double in singles, having won Indian Wells two weeks earlier. It was Świątek's first Miami Open title, her third consecutive WTA 1000 title, and her fourth WTA 1000-level title overall. Świątek became the first woman in history to win the first three WTA 1000 titles of the year in succession, the first player since Serena Williams in 2013 to win three consecutive WTA 1000 titles, and extended her winning streak to 17 matches. She lost no sets and just 26 games en route to the title, the fewest since Martina Hingis dropped 21 games in 2000.
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.
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.
Madison Keys 
Svetlana Kuznetsova 
