The 2021 Los Cabos Open was an ATP tennis tournament played on outdoor hard court. It was the 5th edition of the tournament, and part of the ATP Tour 250 series of the 2021 ATP Tour. It took place in Los Cabos, Mexico from 19 July through 25 July 2021.
The 2022 Atlanta Open was a professional tennis tournament played on hard courts. It was the 34th edition of the tournament, and part of the 2022 ATP Tour. It took place at Atlantic Station in Atlanta, United States between July 24 and 31, 2022.
The 2023 Atlanta Open was a professional tennis tournament played on hard courts. It was the 35th edition of the tournament, and was part of the 2023 ATP Tour. It took place at Atlantic Station in Atlanta, United States between July 24 and 30, 2023.
Dustin Brown and Andrea Vavassori were the defending champions but chose not to defend their title.
The 2024 Nonthaburi Challenger III was a professional tennis tournament played on hard courts. It was the 9th edition of the tournament which was part of the 2024 ATP Challenger Tour. It took place in Nonthaburi, Thailand from 15 to 21 January 2024.
Manuel Guinard and Grégoire Jacq were the defending champions but lost in the first round to Rithvik Choudary Bollipalli and Niki Kaliyanda Poonacha.
The 2024 Delray Beach Open was a professional men's tennis tournament played on hard courts. It was the 32nd edition of the tournament and part of the 2024 ATP Tour. It took place in Delray Beach, United States between February 12 and February 18, 2024.
The 2024 Chennai Open Challenger was a professional tennis tournament played on hard courts. It was the fourth edition of the tournament which was part of the 2024 ATP Challenger Tour. It took place in Chennai, India between 5 and 11 February 2024.
Jay Clarke and Arjun Kadhe were the defending champions but only Kadhe chose to defend his title, partnering Hsu Yu-hsiou. Kadhe lost in the quarterfinals to Toshihide Matsui and Kaito Uesugi.
Chung Yun-seong and Hsu Yu-hsiou were the defending champions but only Chung chose to defend his title, partnering Dan Added. Chung lost in the first round to Tristan Schoolkate and Adam Walton.
The 2024 Pune Challenger was a professional tennis tournament played on hard courts. It was the eighth edition of the tournament which was part of the 2024 ATP Challenger Tour. It took place in Pune, India from 19 to 25 February 2024.
The 2024 San Luis Open was a professional tennis tournament played on outdoor clay courts. It was the 29th edition of the tournament for the men which was part of the 2024 ATP Challenger Tour and 2nd edition for the women which was part of the 2024 WTA 125 tournaments. It took place at the Club Deportivo Potosino in San Luis Potosí, Mexico between 25 and 31 March 2024.
Colin Sinclair and Adam Walton were the defending champions but chose not to defend their title.
Boris Arias and Federico Zeballos were the defending champions but chose not to defend their title.
The 2024 GNP Seguros Tennis Open was a professional tennis tournament played on hard courts. It was the 2nd edition of the tournament which was part of the 2024 ATP Challenger Tour. It took place in Acapulco, Mexico between 15 and 20 April 2024.
The 2024 Little Rock Challenger was a professional tennis tournament played on hard courts. It was the fifth edition of the tournament which was part of the 2024 ATP Challenger Tour. It took place in Little Rock, Arkansas, United States from May 27 to June 2, 2024.
John Peers and Marcus Willis defeated Harold Mayot and Luke Saville in the final, 6–1, 6–7(1–7), [10–7], to win the men's doubles title at the 2024 Nottingham Open.
Matthew Romios and Jason Taylor were the defending champions but only Romios chose to defend his title, partnering Marco Bortolotti. He successfully defended his title after defeating Daniel Dutra da Silva and Courtney John Lock in the final.
André Göransson and Sem Verbeek defeated Robert Cash and James Tracy in the final, 6–3, 6–4 to win the doubles tennis title at the 2024 Hall of Fame Open. It was the first ATP Tour doubles title for Verbeek and the second for Göransson.
Yoshihito Nishioka defeated Jordan Thompson in the final, 4–6, 7–6(7–2), 6–2 to win the singles title at the 2024 Atlanta Open. It was his third ATP Tour title. Nishioka became the first unseeded player to win the tournament since Robby Ginepri in 2009, and was the first singles champion to not be from Australia or the United States.
Yoshihito Nishioka 
Nathaniel Lammons / 
