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. It was formed in September 1972 by Donald Dell, Jack Kramer, and Cliff Drysdale to protect the interests of professional tennis players, and Drysdale became the first president. Since 1990 the association has organized the ATP Tour, the worldwide tennis tour for men and linked the title of the tour with the organization's name. It is the governing body of men's professional tennis. In 1990 the organization was called the ATP Tour, which was renamed in 2001 as just ATP and the tour being called ATP Tour. In 2009 the name of the tour was changed again and was known as the ATP World Tour, but changed again to the ATP Tour by 2019. It is an evolution of the tour competitions previously known as Grand Prix tennis tournaments and World Championship Tennis (WCT). The ATP's global headquarters are in London. ATP Americas is based in Ponte Vedra Beach, Florida; ATP Europe is headquartered in Monaco; and ATP International, which covers Africa, Asia and Australasia, is based in Sydney, Australia.
Nicolás Alejandro Massú Fried, nicknamed El Vampiro, is a Chilean former professional tennis player and a coach. A former world No. 9 in singles, he won the singles and doubles gold medals at the 2004 Athens Olympics. He is the only man to have won both gold medals at the same Games since the re-introduction of Olympic tennis in 1988, and they are Chile's only two Olympic gold medals. Massú also reached the final of the 2003 Madrid Masters and won six singles titles. He was the coach of 2020 US Open champion and former world No. 3 Dominic Thiem from 2019 to 2023.
Chris Pridham is a former touring professional tennis player.
The ITF Grand Prix Circuit was a professional tennis tour for male players that existed founded in 1970 as the ILTF Grand Prix Tennis Circuit it ran annually until 1989 when it and WCT Circuit were replaced by a single world wide ATP Tour.
Martin Wostenholme is a Canadian former touring professional tennis and Davis Cup player. A right-handed predominantly baseline player, Wostenholme was from 1981 to 1984 a four-time All-Ivy Leaguer in singles at Yale University. He had a career ATP singles high ranking of world No. 84, which he attained in November 1985. His career ATP tour win-lost record stands at 49 and 84.
Andrew Sznajder is a Canadian former professional tour tennis player.
Clement N'Goran is a former tennis player from Côte d'Ivoire,
Per Stefan Mikael Simonsson is a former professional tennis player from Sweden. He enjoyed most of his tennis success while playing singles. During his career, he won 2 doubles titles. He achieved a career-high singles ranking of World No. 49 in 1983 and a career-high doubles ranking of World No. 88 in 1984. He is a brother of fellow tennis player Hans Simonsson. After his career, he coached two top 10 players on the ATP ranking, Magnus Gustafsson and Magnus Larsson.
Blaž Kavčič is a Slovenian former professional tennis player. He was the highest ranked Slovenian male player ever, achieving a career-high of World No. 68 in August 2012, until Aljaž Bedene began to play for Slovenia again in January 2018, overtaking him with a career high ranking of 49. He became the first Slovenian ATP singles player to: achieve a Top 100 ranking, win a Grand Slam main draw match and perform at the Summer Olympics. He became the second Slovene ATP player earning over 2 million US dollars in prize money and is the second highest ever paid male Slovene player in history after Aljaž Bedene.
Jun Kamiwazumi is a former Japan Davis Cup team player and tour tennis player.
The 2012 ATP World Tour is the global elite professional tennis circuit organized by the Association of Tennis Professionals (ATP) for the 2012 tennis season. The 2012 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 ATP World Team Championship, the Davis Cup, the ATP World Tour Finals, and the tennis event at the London Summer Olympic Games. Also included in the 2012 calendar is the Hopman Cup, which is organized by the ITF and does not distribute ranking points.
Bart Wuyts is a former professional tennis player from Belgium.
Roberto Argüello is a former professional tennis player from Argentina.
Stephen "Steve" Shaw is a former professional tennis player from England who competed for Great Britain.
John Sobel is a former professional tennis player from the United States.
Andres Võsand is a former professional tennis player from Estonia. He represented the Soviet Union for most of his career, but was based in West Germany, then in 1995 took up German citizenship.
Shane Barr is a former professional tennis player from Australia.
Milen Velev is a former professional tennis player from Bulgaria.
The 2014 ATP World Tour was the global elite men's 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.
Eduardo Vélez is a former professional tennis player from Mexico.
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