The Association of Tennis Professionals (ATP) is the governing body of the men's professional tennis circuits – the ATP Tour, the ATP Challenger Tour and the ATP Champions Tour.
The ATP Finals is the second highest tier of annual men's tennis tournaments after the four Grand Slam tournaments. The ATP Finals are the season-ending championships of the ATP Tour and feature the top eight singles players and doubles teams of the ATP Rankings. The tournament has been one of the popular candidates for the moniker of "the fifth grand slam". The tournament was first held in 1970, although it was known under a different name. Roger Federer holds the record for the most singles titles with six, while Peter Fleming and John McEnroe hold the record for the most doubles titles with seven. In the current tournament, winners are awarded up to a maximum of 1500 ranking points. Participating players win 200 points for each round robin match win, 400 for a semi-final win, and 500 for winning the final.
The Qatar Open, currently known as the Qatar ExxonMobil Open for sponsorship reasons, is a professional tennis tournament played on outdoor hard courts. It is currently part of the ATP Tour 250 series of the Association of Tennis Professionals (ATP) Tour. It is held annually in January at the Khalifa International Tennis and Squash Complex in Doha, Qatar, since 1993.
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 ATP Tour is the modern top-level men's professional tennis circuit. It was introduced in 1990 and it's administered by the Association of Tennis Professionals (ATP). All the records listed here are only for the players who played most of their careers on the ATP Tour and they're based on official ATP data. The names of active players appear in boldface. However, no boldface is used in lists exclusively for active players.
The ATP Rankings are the merit-based method used by the Association of Tennis Professionals (ATP) for determining the qualification for entry as well as the seeding of players in all singles and doubles tournaments. The first rankings for singles were published on 23 August 1973 while the doubles players were ranked for the first time on 1 March 1976. Ranking points are awarded according to the stage of tournament reached, and the prestige of the tournament, with the four Grand Slam tournaments awarding the most points. The rankings are updated every Monday, and points are dropped 52 weeks after being awarded. Daniil Medvedev is the current world No. 1; he became the first man outside the “Big 4” to reach World No. 1 since Andy Roddick in 2004.
Filip Polášek is a Slovak professional tennis player who specialises in doubles. His career-high rankings are World No. 7 in doubles achieved in February 2020 and World No. 555 in singles achieved in November 2007.
The ATP 500 tournaments are the fourth highest tier of annual men's tennis tournament after the four Grand Slam tournaments, ATP Finals, and the ATP Tour Masters 1000.The series includes 13 tournaments, with 500 ranking points awarded for the events' singles champions – which accounts for the name of the series. Tournaments have various draws of 32 and 48 for singles and 16 and 24 for doubles. It is mandatory for leading players to enter at least four 500 events, including at least one after the US Open; if they play fewer than four, or fail to play in one after the US Open they get a "zero" score towards their world ranking for each one short. Roger Federer holds the record for most singles titles at 24, while Daniel Nestor holds the record for most doubles titles won with 20.
Dominic Thiem is an Austrian professional tennis player. He has been ranked as high as world No. 3 in singles by the Association of Tennis Professionals, which he first achieved in March 2020. He is the second-highest ranked Austrian player in history, behind former world No. 1 Thomas Muster. He has won 17 ATP Tour singles titles, including a Grand Slam title at the 2020 US Open where he came back from two sets down to defeat Alexander Zverev in the final. With the win, Thiem became the first male player born in the 1990s to claim a Grand Slam singles title, as well as the first Austrian to win the US Open singles title. He had previously reached three other Grand Slam finals, losing at the 2018 and 2019 French Opens to Rafael Nadal, and at the 2020 Australian Open to Novak Djokovic. Thiem was also runner-up at the 2019 and 2020 ATP Finals, where he lost to Stefanos Tsitsipas and Daniil Medvedev.
The 2014 ATP World Tour was the global male elite professional tennis circuit organized by the Association of Tennis Professionals (ATP) for the 2014 tennis season. The 2014 ATP World Tour calendar comprises the Grand Slam tournaments, the ATP World Tour Masters 1000, the ATP World Tour 500 series, the ATP World Tour 250 series, the Davis Cup and the ATP World Tour Finals. Also included in the 2014 calendar is the Hopman Cup, which is organized by the ITF and does not distribute ranking points.
Alexander "Sascha" Zverev is a German professional tennis player. He has been ranked by the Association of Tennis Professionals (ATP) as high as world No. 3, and has been a permanent fixture in the top 10 since July 2017. Zverev's career highlights include titles at the 2018 and the 2021 ATP Finals, and the 2020 Tokyo Olympics. He is the only active player outside of the Big Four with five ATP Masters 1000 titles. Zverev has won 19 ATP titles in singles and two in doubles. He reached his first major final at the 2020 US Open, finishing runner-up to Dominic Thiem.
The 2015 ATP World Tour was the global elite professional tennis circuit organized by the Association of Tennis Professionals (ATP) for the 2015 tennis season. The 2015 ATP World Tour calendar comprises the Grand Slam tournaments, the ATP World Tour Masters 1000, the ATP World Tour 500 series, the ATP World Tour 250 series, the Davis Cup and the ATP World Tour Finals. Also included in the 2015 calendar is the Hopman Cup, which is organized by the ITF and does not distribute ranking points.
Andrey Andreyevich Rublev is a Russian professional tennis player. He reached a career-high singles ranking of No. 5 by the ATP on 13 September 2021. Rublev broke into the top 10 of the ATP Tour in October 2020. He has won 10 ATP singles titles. He has a career-high doubles ranking of No. 59, achieved on 18 October 2021. He has won two doubles titles and is an Olympic gold medalist, winning the mixed doubles title at the 2020 Summer Olympics with Anastasia Pavlyuchenkova.
Taylor Harry Fritz is an American professional tennis player. He has a career-high singles ranking of world No. 16 by the Association of Tennis Professionals (ATP), achieved on February 21, 2022, and a doubles ranking of world No. 104, achieved on July 26, 2021. He reached his maiden ATP final in only his third career event, the 2016 Memphis Open. Only one other American, John Isner, has reached an ATP final in fewer career events. Fritz won a junior major singles title at the 2015 US Open, and was the runner-up in junior singles at the 2015 French Open.
The 2016 ATP World Tour was the global elite professional tennis circuit organized by the Association of Tennis Professionals (ATP) for the 2016 tennis season. The 2016 ATP World Tour calendar comprised the Grand Slam tournaments, the ATP World Tour Masters 1000s, the ATP World Tour 500 series, the ATP World Tour 250 series, the Davis Cup, and the ATP World Tour Finals. Also included in the 2016 calendar were the tennis events at the 2016 Summer Olympics and Hopman Cup, neither of which distributed ranking points.
The 2017 ATP World Tour was the global elite men's professional tennis circuit organized by the Association of Tennis Professionals (ATP) for the 2017 tennis season. The 2017 ATP World Tour calendar comprised the Grand Slam tournaments, the ATP World Tour Masters 1000, the ATP Finals, the ATP World Tour 500 series, the ATP World Tour 250 series and the Davis Cup. Also included in the 2017 calendar are the Hopman Cup and the Next Gen ATP Finals, which do not distribute ranking points.
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 ATP Tour was the global elite men's professional tennis circuit organised by the Association of Tennis Professionals (ATP) for the 2021 tennis season. The 2021 ATP Tour calendar comprised the Grand Slam tournaments, the ATP Finals, the ATP Tour Masters 1000, the ATP Cup, the ATP Tour 500 series and the ATP Tour 250 series. Also included in the 2021 calendar were the Davis Cup, the Summer Olympics in Tokyo, Next Gen ATP Finals, Laver Cup, none of which distributed ranking points.
The 2022 ATP Tour is the global elite men's professional tennis circuit organised by the Association of Tennis Professionals (ATP) for the 2022 tennis season. The 2022 ATP Tour calendar comprises the Grand Slam tournaments, the ATP Finals, the ATP Tour Masters 1000, the ATP Cup, the ATP 500 series and the ATP 250 series. Also included in the 2022 calendar are the Davis Cup, Next Gen ATP Finals, and Laver Cup, none of which distribute ranking points.
Jaime Yzaga 
Jim Pugh 
Simon Youl 
Ramesh Krishnan 
Kelly Evernden 
Michael Stich 
Emilio Sánchez 
Wayne Ferreira 
Thomas Enqvist 
Jacco Eltingh 
Luciana Corsato 
Alexia Dechaume 
Larisa Neiland 
Natalia Medvedeva 
Judith Wiesner 
Andrés Gómez 
Andrei Olhovskiy 
Byron Black 
Nana Miyagi 
Linda Ferrando 
Florencia Labat