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.
Lu Yen-hsun is a Taiwanese retired professional tennis player, who goes by the nickname Rendy Lu. He won the most titles on the ATP Challenger Tour in tennis history. His favorite surface is hardcourt, though several of his ATP Tour career highlights came on grass, including reaching the quarterfinals of the 2010 Wimbledon Championships.
The ATP International Series was a series of professional tennis tournaments held internationally as part of the ATP Tour from 2000 to 2008.
Joseph Sirianni is a former Australian tennis player from Melbourne, Victoria. Sirianni was born to father Joseph and mother Ida. Sirianni turned professional in 1996 and he plays right-handed. He achieved his career-high singles ranking of World Number 138 on 20 October 2008. Sirianni has participated in the Australian Open on five occasions.
Brydan Klein is an Australian-born British professional tennis player. As a junior, Klein won the 2007 Australian Open and reached a career-high top five in the ITF junior rankings. However, Klein has struggled to make the transition onto the men's professional circuit, failing to enter the top 150 or gain entry into any Grand Slam event without being given a Wild card. In 2009, Klein was banned from playing professional tennis for six months and fined $24,000 for racially abusing an opponent.
The Nottingham Trophy was an annual tennis tournament played in Nottingham, England. The tournament was part of the 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 Orbetello Challenger was a professional tennis tournament played on outdoor red clay courts. It was part of the Association of Tennis Professionals (ATP) Challenger Tour. It was held annually in Orbetello, Italy, from 2009 to 2013.
Marinko Matosevic is a retired Australian professional tennis player. His career-high singles ranking is World No. 39, which he achieved in February 2013. Matosevic defeated top players including Milos Raonic, Marin Čilić, Nikolay Davydenko, Jo-Wilfried Tsonga and John Isner.
The Beijing International Challenger was a tennis tournament held in Beijing, China, from 2010 to 2013. The event was part of the ATP Challenger Tour and the ITF Women's Circuit and was played on outdoor hard courts. It was also part of the China Open Series.
The 2011 Caloundra International was a professional tennis tournament played on outdoor hard courts. It was part of the 2011 ATP Challenger Tour. It took place in Caloundra, Australia between 7 and 13 February 2011.
James Duckworth is an Australian professional tennis player. He has a career-high Association of Tennis Professionals (ATP) singles ranking of World No. 47 achieved on 8 November 2021 and No. 185 in doubles achieved on 10 February 2020. As a junior, Duckworth enjoyed a successful career which included winning three titles and reaching the semi-finals of the 2010 French Open. Duckworth represented Australia in tennis at the 2020 Tokyo Olympics and the 2022 ATP Cup.
The Ningbo International Tennis Open is a tennis tournament held in Ningbo, China. The event was part of the WTA 125K series and is now part of the ATP Challenger Tour. It is played on outdoor hardcourts. The men's event ended in 2012 but restarted in 2015. The event was previously called the Ningbo Challenger.
The 2012 Caloundra International was a professional tennis tournament played on hard courts. It was the sixth edition of the tournament which was part of the 2012 ATP Challenger Tour. It took place in Caloundra, Australia between 6 and 12 February 2012.
The Bendigo 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 Bendigo, Victoria, Australia, since 2009.
Andrew Whittington is a former Australian professional tennis player. Whittington has now turned to coaching, he will be coaching former doubles partner and current professional Australian tennis player Alex Bolt for the upcoming 2022 summer. He made the world's top 200 in August 2016 following a semi-final run at the 2016 Kentucky Bank Tennis Championships.
The Internazionali di Tennis San Marino Open is a professional tennis tournament played on red clay. It's part of the Association of Tennis Professionals (ATP) Challenger Tour. It's held annually at the Centro Tennis Cassa di Risparmio di Fonte dell'Ovo in the City of San Marino, San Marino, since 1988.
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.
Christopher "Chris" 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. 111 on 14 September 2020 and a doubles ranking of No. 481 on 31 January 2022. He made his ATP Tour debut in January 2017 in his hometown at the Sydney International.
The City of Playford Tennis 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 Circuit. It is held annually at the Playford City Tennis Centre in Playford, Australia, since 2018. The men's event replaces the City of Onkaparinga ATP Challenger held from 2015 until 2017.
2012 Caloundra International 
