The Challenge Tour is the second-tier men's professional golf tour in Europe. It is operated by the PGA European Tour and, as with on the main European Tour and the European Senior Tour, some of the events are played outside Europe.
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 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 ATP Challenger Tour is the secondary professional tennis circuit organized by the ATP. The 2009 ATP Challenger Tour calendar comprised 20 top tier Tretorn SERIE+ tournaments, and 142 regular series tournaments, with prize money ranging from $25,000 up to $150,000.
The ATP Challenger Tour is the secondary professional tennis circuit organized by the ATP. The 2010 ATP Challenger Tour calendar comprises 13 top tier Tretorn SERIE+ tournaments, and approximately 150 regular series tournaments, with prize money ranging from $35,000 up to $150,000.
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 Q Tour is a series of snooker tournaments, immediately below the level of the World Snooker Main Tour.
The ATP Challenger Tour was the secondary professional tennis circuit organized by the Association of Tennis Professionals (ATP). The 2011 ATP Challenger Tour calendar comprised 15 top tier Tretorn SERIE+ tournaments, and approximately 150 regular series tournaments, with prize money ranging from $35,000 up to $150,000.
The ATP Challenger Tour Finals was a tennis tournament played between 2011 and 2015 at the end of season, involving the top seven players in that year's ATP Challenger Tour, plus an invited player from the tournament's host country.
Divij Sharan is an Indian professional tennis player. He specialises in doubles and competes on the ATP World Tour. He has won 5 ATP World Tour titles in men's doubles and represents India in the Davis Cup. He won a gold medal in the men's doubles at the 2018 Asian Games.
The 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.
Brooks Koepka is an American professional golfer who plays LIV Golf. In October 2018, he became World Number 1 in the Official World Golf Ranking for 47 weeks after winning the 2018 CJ Cup. He won the U.S. Open in 2017 and 2018, and the PGA Championship in 2018 and 2019, becoming the first golfer in history to hold back-to-back titles in two majors simultaneously. He started his career on the European Challenge Tour and eventually the European Tour. He played college golf at Florida State University.
The ATP Challenger Tour, in 2015 was the secondary professional tennis circuit organized by the ATP. The 2015 ATP Challenger Tour calendar comprised 166 tournaments, with prize money ranging from $40,000 up to $220,000. It was the 38th edition of challenger tournaments cycle, and 7th under the name of Challenger Tour.
Félix Auger-Aliassime is a Canadian professional tennis player. He is the second-youngest player ranked in the top 10 by the Association of Tennis Professionals (ATP), and has a career-high singles ranking of No. 8, which he achieved on 21 August 2022, and doubles ranking of No. 60, attained on 1 November 2021. He has one singles title and one doubles title on the ATP Tour.
The ATP Challenger Tour, in 2016, was the secondary professional tennis circuit organized by the ATP. The 2016 ATP Challenger Tour calendar contained 166 tournaments, with prize money ranging from $40,000 up to $125,000. It was the 39th edition of challenger tournaments cycle, and 8th under the name of Challenger Tour.
The ATP Challenger Tour in 2019 was the secondary professional tennis circuit organized by the ATP. The 2019 ATP Challenger Tour calendar had 158 tournaments scheduled, with prize money ranging from $54,160 up to $162,480. It was the 42nd edition of challenger tournaments cycle, and 11th under the name of Challenger Tour.
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 ATP Challenger Tour in 2020 was the secondary professional tennis circuit organized by the ATP. The 2020 ATP Challenger Tour calendar comprised 57 tournaments with prize money ranging from $35,000 up to $162,480. It was the 43rd edition of challenger tournaments cycle and 12th under the name of Challenger Tour.
The Valorant Champions Tour (VCT) is a global competitive esports tournament series for the video game Valorant run by Riot Games. The series run multiple events throughout each season, culminating in Valorant Champions, the top-level event of the tour. The VCT was announced in 2020, with its inaugural season taking place in 2021.
The ATP Challenger Tour in 2022 is the secondary professional tennis circuit organized by the ATP. The 2022 ATP Challenger Tour calendar comprises 166 tournaments, with prize money ranging from $37,520 up to $159,360. It is the 45th edition of challenger tournaments cycle, and 14th under the name of Challenger Tour.
Nicolas Colsaerts 
