The ATP Tour is a worldwide top-tier tennis tour for men organized by the Association of Tennis Professionals. The second-tier tour is the ATP Challenger Tour and the third-tier is the ITF Men's World Tennis Tour. The equivalent women's organisation is the WTA Tour.
The Brawo Open, known as Nord/LB Open until 2010 and the Sparkassen Open until 2021, is a professional tennis tournament played on outdoor red clay courts. It is currently part of the Association of Tennis Professionals (ATP) Challenger Tour. It is held annually at the Braunschweiger Tennis- und Hockey Club in Braunschweig, Germany, since 1994.
The Sanremo Challenger, previously known as Sanremo Tennis Cup is a professional tennis tournament played on outdoor red clay courts. It is currently part of the Association of Tennis Professionals (ATP) Challenger Tour. It is held annually at the Circolo Tennis Sanremo in Sanremo, Italy, since 2002. After a hiatus of 10 years, it came back in 2022 with a new edition.
Marcelo Fedrizzi Demoliner is a Brazilian professional tennis player. A doubles specialist, he has won five doubles titles. He won his first title at the ATP 250 Antalya Open with Santiago González in June 2018, after having reached six finals at that level. He was runner-up at the ATP 500 Vienna in 2018 and Saint Petersburg in 2020.
The ATP Challenger Open is a professional tennis tournament played on outdoor red clay courts. It is currently part of the Association of Tennis Professionals (ATP) Challenger Tour. It is held annually at the TC EMPIRE in Trnava, Slovakia, since 2007.
The Almaty Challenger is a professional tennis tournament played on clay courts. It is currently part of the Association of Tennis Professionals (ATP) Challenger Tour. It is held annually in Almaty, Kazakhstan since 2017.
The Emami Kolkata Open ATP Challenger Tour is a professional tennis tournament played on outdoor hard courts. It is currently part of the ATP Challenger Tour. It is held annually at the Bengal Tennis Association Stadium in Kolkata, India since 2014.
The Internazionali di Tennis San Marino Open is a professional tennis tournament played on red clay. It is currently part of the Association of Tennis Professionals (ATP) Challenger Tour and has been held annually in San Marino since 1988. For the first three years it was held at Centro Sportivo Serravalle before moving to its current home in 1991, the Centro Tennis Cassa di Risparmio di Fonte dell'Ovo in the City of San Marino.
The Chengdu Challenger is a professional tennis tournament played on hard courts. It is currently part of the ATP Challenger Tour. It is held annually in Chengdu, China, since 2016.
The Columbus Challenger is a professional tennis tournament played on hard courts. It is currently part of the ATP Challenger Tour and WTA 125K series. The ATP event is held annually in Columbus, Ohio, U.S.A, as it has been since 2015, the tournament's start. The women's edition started in 2021.
The 2015 Fairfield Challenger was a professional tennis tournament played on hard courts. It was the first edition of the tournament which was part of the 2015 ATP Challenger Tour. It took place in Fairfield, California, United States between 12 and 18 October 2015.
The Monterrey Challenger is a professional tennis tournament played on hard courts. It is currently part of the ATP Challenger Tour. It is held annually in Monterrey, Mexico since 2015.
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, California, United States between 10 and 16 October 2016.
Christopher O'Connell is an Australian professional tennis player. He grew up on the Northern Beaches of Sydney. O'Connell reached a career high ATP singles ranking of World No. 70 on 19 June 2023 and a doubles ranking of No. 460 on 25 April 2022. He made his ATP Tour debut in January 2017 in his hometown at the Sydney International. As of August 28, 2023, he was one of only twelve members of the ATP top 100 to hit a one-handed backhand.
The 2017 Fairfield Challenger was a professional tennis tournament played on hard courts. It was the third edition of the tournament which was part of the 2017 ATP Challenger Tour. It took place in Fairfield, California, United States between 9 and 15 October 2017.
The 2018 Fairfield Challenger was a professional tennis tournament played on hard courts. It was the fourth edition of the tournament which was part of the 2018 ATP Challenger Tour. It took place in Fairfield, California, United States between 8 and 14 October 2018.
The Oracle Challenger Series – Houston is a professional tennis tournament played on hard courts. It is currently part of the ATP Challenger Tour and the Women's Tennis Association (WTA) 125K series. It is held annually in Houston, United States since 2018. The ATP Challenger Tour returned to Houston, Texas for the first time since 2001, with the inaugural Oracle Challenger Series Houston making its debut in November. Held on the campus of Rice University, at the new $9 million George R. Brown Tennis Complex. Houston is will become one of just two U.S. cities to host tournaments on both the ATP World Tour and ATP Challenger Tour, with the ATP World tour tournament being the U.S. Men's Clay Court Championships. The Oracle Challenger Series – Houston is the second stop for the Oracle Challenger Series calendar. The winner of the Oracle Challenger Series earns a wild card into Indian Wells Masters.
The Emilia-Romagna Open is a professional tennis tournament played on clay courts. It is currently part of the WTA Tour for women and minor league ATP Challenger Tour for men. It is held annually in Montechiarugolo, Parma, Italy since 2021 and 2019.
The 2019 Fairfield Challenger was a professional tennis tournament played on hard courts. It was the fifth edition of the tournament which was part of the 2019 ATP Challenger Tour. It took place in Fairfield, California, United States between 7 and 13 October 2019.
The 2022 Fairfield Challenger was a professional tennis tournament played on hard courts. It was the sixth edition of the tournament which was part of the 2022 ATP Challenger Tour. It took place in Fairfield, California, United States between 10 and 16 October 2022.
2022 Fairfield Challenger 
