Mischa Zverev was the defending champion, but chose not to participate this year.
This was the first edition of the tournament.
Michael Mmoh was the defending champion but lost in the second round to Brandon Nakashima.
First seed Alexander Zverev won the tournament, defeating third seed Félix Auger-Aliassime 6–3, 6–3 in the final. This was the first edition of the tournament, primarily organised due to the cancellation of many tournaments in 2020, due to the COVID-19 pandemic.
Alexander Zverev defeated Andrey Rublev in the final, 6–2, 6–3 to win the men's singles tennis title at the 2021 Cincinnati Masters. It was his fifth Masters 1000 title and 17th career singles title on the ATP Tour.
Hubert Hurkacz was the reigning champion from when the tournament was last held in 2019, but chose not to participate this year.
Wu Yibing defeated John Isner in the final, 6–7(4–7), 7–6(7–3), 7–6(14–12) to win the singles tennis title at the 2023 Dallas Open. Wu became the first Chinese man in the Open Era to reach an ATP Tour singles final and win a title. He saved four championship points en route to the title.
Novak Djokovic defeated Grigor Dimitrov in the final, 6–4, 6–3 to win the singles tennis title at the 2023 Paris Masters. It was his record-extending seventh Paris Masters title and record-extending 40th Masters title overall, and he extended his winning streak to 18 matches with the win.
Adrian Mannarino defeated Jack Draper in the final, 7–6(8–6), 2–6, 6–3 to win the singles tennis title at the 2023 Sofia Open. It was his third ATP Tour singles title of the season and the fifth of his career.
The 2024 Dallas Open was a men's tennis tournament played on indoor hard courts. It was the 3rd edition of the Dallas Open, and part of the ATP Tour 250 series on the 2024 ATP Tour. It took place at the Styslinger/Altec Tennis Complex in the city of Dallas, United States, between February 5–11, 2024.
Defending champion Taylor Fritz defeated Tommy Paul in the final, 6–2, 6–3 to win the singles tennis title at the 2024 Delray Beach Open. It was his seventh ATP Tour singles title, and he did not lose a set en route. Paul was seeking his second ATP Tour title in as many weeks, having won Dallas the week prior.
Jordan Thompson defeated Casper Ruud in the final, 6–3, 7–6(7–4) to win the singles tennis title at the 2024 Los Cabos Open. It was his first ATP Tour singles title and he saved three match points en route, in the quarterfinals against Alex Michelsen.
Defending champion Carlos Alcaraz defeated Daniil Medvedev in a rematch of the previous year's final, 7–6(7–5), 6–1 to win the men's singles tennis title at the 2024 Indian Wells Open. It was his fifth ATP Masters 1000 and 13th career ATP Tour title. Alcaraz became the first player to defend the title since Novak Djokovic in 2016, and the eighth overall; he was the second player to do so before turning 21, after Boris Becker in 1988.
Alex de Minaur defeated Sebastian Korda in the final, 6–2, 6–4 to win the men's singles tennis title at the 2024 Libéma Open. De Minaur did not drop a set en route to his ninth ATP Tour title and his second on grass, after the 2021 Eastbourne International. He became the first Australian man to win the title since Lleyton Hewitt in 2001.
Matteo Berrettini defeated Quentin Halys in the final, 6–3, 6–1 to win the singles tennis title at the 2024 Swiss Open Gstaad. He did not drop a set en route to his second title in Gstaad and ninth ATP Tour title overall. Halys was the first qualifier to reach the final since Yannick Hanfmann in 2017.
Sebastian Korda defeated Flavio Cobolli in the final, 4–6, 6–2, 6–0 to win the men's singles tennis title at the 2024 Washington Open. It was Korda's second ATP Tour title, first ATP 500 title, first title since 2021, and first hardcourt title after previous five hardcourt runner-up finishes. Both players saved match points en route to the final: Korda saved two in his third-round match against Thanasi Kokkinakis, while Cobolli saved five in his third-round match against Alejandro Davidovich Fokina. Korda's father Petr won the title at the same tournament in 1992, marking the first time that a father-son duo won the same ATP tournament.
Marin Čilić defeated Zhang Zhizhen in the final, 7–6(7–5), 7–6(7–5) to win the inaugural singles tennis title at the 2024 Hangzhou Open. He saved two match points en route to his 21st career ATP Tour singles title, and his first since the 2021 St. Petersburg Open.
Shang Juncheng defeated Lorenzo Musetti in the final, 7–6(7–4), 6–1 to win the singles title at the 2024 Chengdu Open. Shang dropped just one set en route to his first ATP Tour singles title, and became the second Chinese man to win a tour-level singles title in the Open Era, after Wu Yibing at the 2023 Dallas Open. Shang was also the first player born in 2005 to win a singles title, making him the youngest winner on the Tour for the season.
Jannik Sinner defeated Novak Djokovic in the final, 7–6(7–4), 6–3 to win the singles title at the 2024 Shanghai Masters. It was his fourth ATP Masters 1000 singles title, seventh title of the season, and 17th career title. By reaching the final, Sinner secured the year-end No. 1 ranking for the first time in his career. Djokovic reached a career record-extending 59th Masters 1000 final.
Duje Ajduković was the defending champion but chose not to defend his title.
Tommy Paul 
