The Australian Open is a tennis tournament held annually at Melbourne Park in Melbourne, Australia. The tournament is the first of the four Grand Slam tennis events held each year, preceding the French Open, Wimbledon, and the US Open. It features men's and women's singles; men's, women's, and mixed doubles; junior's championships; and wheelchair, legends, and exhibition events. Before 1988, it was played on grass courts, but since then three types of hardcourt surfaces have been used: green-coloured Rebound Ace up to 2007, blue Plexicushion from 2008 to 2019, and blue GreenSet since 2020.
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 ITF Men's World Tennis Tour. The equivalent women's organisation is the WTA Tour.
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 Manchester Trophy is a professional tennis tournament played on outdoor grass courts. It was previously part of the Association of Tennis Professionals (ATP) Challenger Tour and now currently part of the International Tennis Federation (ITF) Women's Circuit. It is held annually at the Northern Lawn Tennis Club in the Didsbury suburb of Manchester, England, United Kingdom, since 1995. The original defunct tournament, the Manchester Open, began in 1880 and continued until the event became a lower level Challenger tournament in 1995. The Challenger level event ended in 2009, but was revived in 2015. The men's tournament was discontinued after the 2016 edition while the women's tournament was established in 2017.
The Nottingham Trophy was an annual tennis tournament played in Nottingham, England. The tournament was part of the Association of Tennis Professionals (ATP) Challenger Tour and the International Tennis Federation as a $75,000 event. The tournament's key sponsor was Dutch insurance firm Aegon. The Aegon Trophy and Aegon Nottingham Challenge were the only Challenger events to be held on grass. The tournament was held at the end of May before the main tour's grass-court season starts.
The Rijeka 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 in Rijeka, Croatia, since 2007.
The ITF Women's World Tennis Tour, previously known as the ITF Women's Circuit, is a series of professional tennis tournaments run by the International Tennis Federation for female professional tennis players.
The Knoxville Challenger is a professional tennis tournament played on indoor Hard courts. It is currently part of the Association of Tennis Professionals (ATP) Challenger Tour. It is held annually in Knoxville, Tennessee, United States, since 2000.
The Nottingham Challenge was an annual tennis tournament played in Nottingham, England. The men's tournament was part of the Association of Tennis Professionals (ATP) Challenger Tour. The women's event was played in International Tennis Federation (ITF) Women's Circuit.
Luke Saville is an Australian professional tennis player. He has had success as a doubles player where he reached his highest ranking of World No. 23 on 8 November 2021. Saville reached the final at the 2020 Australian Open, partnering with fellow Australian Max Purcell.
The Association of Tennis Professionals (ATP) Challenger Tour was the secondary professional tennis circuit organized by the ATP. The 2012 ATP Challenger Tour calendar comprised 15 top tier Tretorn SERIE+ tournaments, and a total of 148 tournaments, with prize money ranging from $35,000 up to $150,000.
Athanasios "Thanasi" Kokkinakis is an Australian professional tennis player. He has been ranked as high as world No. 69 in singles by the Association of Tennis Professionals (ATP), which he first achieved on 8 June 2015. He has won one ATP Tour title in singles and produced his best Major singles performance at the 2015 French Open by reaching the third round. Kokkinakis also has a career-high doubles ranking of world No. 46 which he attained on 31 January 2022 after winning the 2022 Australian Open with countryman Nick Kyrgios.
The Traralgon International is a professional tennis tournament played on outdoor hard courts. It is currently part of the Association of Tennis Professionals (ATP) Challenger Tour and the International Tennis Federation (ITF) Women's World Tennis Tour. It is held annually in Traralgon, Victoria, Australia, since 2006.
Félix Auger-Aliassime is a Canadian professional tennis player. He is the second-youngest player ranked in the top 20 by the Association of Tennis Professionals (ATP), and has a career-high singles ranking of No. 9, which he achieved on 10 January 2022, and doubles ranking of No. 60, attained on 1 November 2021. He has eight runner-up finishes in singles and one doubles title on the ATP Tour.
The Tennis Championships of Maui is a professional tennis tournament played on outdoor hard courts. It is currently part of the Association of Tennis Professionals (ATP) Challenger Tour. It is held annually in Lahaina, Maui. It was moved from Honolulu to Maui in 2013, and to the Royal Lahaina in 2014. The tournament was included in the ITF Women's Circuit for one year, in 2016.
The Oracle Challenger Series – Houston is a professional tennis tournament played on hard courts. It is currently part of the Association of Tennis Professionals (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 Tennis Challenger Hamburg is a professional tennis tournament played on indoor hard courts. It is currently part of the ATP Challenger Tour. It is held annually in Hamburg, Germany since 2019.
Thomas Buchmayer 
Thierry Guardiola 
Guillermo Pérez Roldán 
Karel Nováček 
Alberto Berasategui 
Dominik Hrbatý 
Yuri Schukin 
Filippo Volandri 
Roko Karanušić 
Florian Mayer 
Victor Hănescu 
