The ATP Challenger Tour, known until the end of 2008 as the ATP Challenger Series, is a series of international men's professional tennis tournaments. The Challenger Tour events are the second-highest tier of tennis competition, behind the ATP Tour. The ITF World Tennis Tour tournaments are on the entry-level of international professional tennis competition. The ATP Challenger Tour is administered by the Association of Tennis Professionals. Players who succeed on the ATP Challenger Tour earn sufficient ranking points to become eligible for main draw or qualifying draw entry at ATP Tour tournaments. Players on the Challenger Tour are usually young players looking to advance their careers, those who fail to qualify for ATP events, or former ATP players looking to get back into the big tour.
The Brasil Open was a tennis tournament held annually in São Paulo, Brazil. It was part of the ATP Tour 250 series, and was one of the main events in the Brazilian tennis calendar alongside ATP Tour 500 Rio Open. Since 2004, it was a part of the South American clay court circuit but was held on hard courts prior to 2004. Nicolás Almagro and Pablo Cuevas hold the record for most singles titles with three each, while in doubles the record is held by Bruno Soares with three consecutive titles from 2011 to 2013. On 15 October 2019, tournament organisers announced that the tournament was being scrapped in favour of a return to the Chile Open.
Carlos Alberto Berlocq is an Argentine retired professional tennis player nicknamed Charly, Panther and Warlocq. His favourite surface was clay and he was last coached by Walter Grinovero. Berlocq's career-high singles ranking was World No. 37, achieved in March 2012.
The Cachantún Cup is a professional tennis tournament played on outdoor red clay courts. It is part of the Association of Tennis Professionals (ATP) Challenger Tour. It was held annually in Providencia, Chile, from 2005 to 2009. The tournament was then moved to Vitacura, Santiago Metropolitan Region. The October editions of 2021 were played at the Club Palestino in Las Condes.
Marcelo Fedrizzi Demoliner is a Brazilian professional tennis player. A doubles specialist, he won his first title at the ATP 250 Antalya Open in June 2018, after having reached 6 finals at that level. Runner-up at the ATP 500 Vienna in 2018 and Saint Petersburg in 2020. Alongside Maria José Martinez Sanchez, he was mixed doubles semifinalist in 2017 Wimbledon Championships and 2018 Australian Open. He reached a career high ranking of world number 34 in doubles in November 2017.
Andrés Molteni is a professional tennis player from Argentina. He reached his highest ATP singles ranking of No. 181 in May 2011 and his highest ATP doubles ranking of No. 37 on 21 February 2022 respectively. He has won 10 doubles ATP titles. He competes mainly on the ATP Challenger Tour and ITF Futures, both in singles and doubles.
The 2012 Dallas Tennis Classic was a professional tennis tournament played on hard courts. It was the first edition of the tournament, which was part of the 2012 ATP Challenger Tour. It took place in Irving, United States between 12 and 18 March 2012.
Matteo Donati is an Italian professional tennis player. On 13 April 2015, he reached the final of the ATP Challenger Tour Napoli Cup to claim a career-high of no. 247 on the ATP World Tour Singles rankings.
The 2016 Canberra Challenger was a professional tennis tournament played on outdoor hard courts. It was the first edition of the tournament, which was part of the 2016 ATP Challenger Tour. It took place in Canberra, Australia between 9 and 16 January 2016.
The 2016 Fairfield Challenger was a professional tennis tournament played on hard courts. It was the second edition of the tournament which was part of the 2016 ATP Challenger Tour. It took place in Fairfield, United States between 10 and 16 October 2016.
The 2015 Santiago Challenger was a professional tennis tournament played on clay courts. It was the first edition of the tournament which was part of the 2015 ATP Challenger Tour. It took place in Santiago, Chile between 19 and 25 October 2015.
The 2017 Irving Tennis Classic was a professional tennis tournament played on hard courts. It was the sixth edition of the tournament which was part of the 2017 ATP Challenger Tour. It took place in Irving, United States between 14 and 19 March 2017.
David Pel is a Dutch tennis player.
Thiago Seyboth Wild is a Brazilian tennis player. He won 2018 US Open junior singles title. He reached a career high ATP singles ranking of No. 106 on September 14, 2020 and a career high ITF junior ranking of No. 8 on January 22, 2018. He also has a career high ATP doubles ranking of 393 achieved on February 10, 2020.
The 2020 ATP Tour was the global elite men's professional tennis circuit organised by the Association of Tennis Professionals (ATP) for the 2020 tennis season. The 2020 ATP Tour calendar was composed of the Grand Slam tournaments, the ATP Finals, the ATP Tour Masters 1000, the ATP Cup, the ATP Tour 500 series, the ATP Tour 250 series, and the Davis Cup. Also included in the 2020 calendar were the tennis events at the Next Generation ATP Finals, and the Laver Cup, neither of which distributed ranking points. Several tournaments were suspended or postponed due to the COVID-19 pandemic, including the Summer Olympics in Tokyo. On 17 June 2020, ATP issued the revised calendar for Tour resumption.
The 2021 Challenger de Santiago was a professional tennis tournament played on clay courts. It was the 13th edition of the tournament which was part of the 2021 ATP Challenger Tour. It took place in Santiago, Chile between 15 and 21 March 2021.
The 2021 Challenger de Santiago II was a professional tennis tournament played on clay courts. It was the 14th edition of the tournament which was part of the 2021 ATP Challenger Tour. It took place in Santiago, Chile between 4 and 10 October 2021.
The 2021 Challenger de Santiago III was a professional tennis tournament played on clay courts. It was the 15th edition of the tournament which was part of the 2021 ATP Challenger Tour. It took place in Santiago, Chile between 11 and 17 October 2021.
The 2021 Challenger de Buenos Aires was a professional tennis tournament played on clay courts. It was the tenth edition of the tournament which was part of the 2021 ATP Challenger Tour. It took place in Buenos Aires, Argentina between 18 and 24 October 2021.
Santiago Rodríguez Taverna is an Argentine tennis player.
Nicolás Jarry [1] 
Marcelo Arévalo 
Máximo González 
Rogério Dutra Silva 
Sergio Galdós 
Andrej Martin