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.
Frederik Fetterlein is a retired tennis player from Denmark, who turned professional in 1989.
Christian Ruud is a Norwegian former tennis player who turned professional in 1991. He achieved a career-high singles ranking of world No. 39 in October 1995, reaching the fourth round of the 1997 Australian Open and the quarterfinals of the 1997 Monte Carlo Masters. He retired in 2001 after the 2001 French Open. He was the highest-ranked Norwegian male player ever on the ATP Tour until his son Casper Ruud surpassed him in February 2020.
Bent-Ove Pedersen is a former tennis player from Norway, who turned professional in 1992.
Tuomas Ketola is a Finnish former professional tennis player on the ATP Tour.
Jan Frode Andersen is a Norwegian former tennis player. He played tennis for Norway, including competing in at least 60 countries over a span of 8 years after turning professional in 1997. He represented Norway in the Davis Cup for 10 consecutive years compiling a 30–22 record. His highest ATP ranking was 135. This makes him the third best player in Norwegian history, after Christian Ruud and Casper Ruud.
Martin Pedersen is a former professional Danish tennis player. He played predominantly on the ATP Challenger Tour, both in doubles and singles.
Olli Rahnasto is a retired professional tennis player from Finland.
Toshihide Matsui is a professional Japanese tennis player. On 12 June 2006, he reached his highest ATP singles ranking of No. 261. He achieved his highest doubles ranking of No. 128 in September 2023.
Markus Eriksson is a retired Swedish tennis player. Eriksson has a career high ATP singles ranking of 277, achieved on 19 August 2019.
Casper Ruud is a Norwegian professional tennis player. Ruud has a career-high singles ranking of world No. 2, achieved on 12 September 2022, making him the highest-ranked Norwegian in history. He has won ten ATP Tour singles titles and finished runner-up at three Grand Slams and at the 2022 ATP Finals.
Viktor Durasovic is a Norwegian professional tennis player.
Joran Vliegen is a Belgian professional tennis player who specializes in doubles. Vliegen has a career high ATP doubles ranking of World No. 17 achieved on 7 August 2023. He also has a career high singles ranking of World No. 508 achieved on 1 August 2016. Vliegen won two singles titles on the ITF Men's Circuit, but now focuses on doubles. Vliegen has claimed 7 ATP tour doubles titles with partner Sander Gillé.
Joris De Loore is a Belgian tennis player. De Loore has a career high ATP singles ranking of No. 156 achieved on 16 October 2023. He also has a career high ATP doubles ranking of No. 263, achieved on 24 December 2018. De Loore has won one Challenger, eleven ITF singles titles and one Challenger, fourteen ITF doubles titles. He competes mainly on the ATP Challenger Tour. He is currently the No. 2 Belgian singles tennis player.
Altuğ Çelikbilek is a Turkish professional tennis player.
Evgeny Konstantinovich Karlovskiy is a Russian tennis player.
Lukas Hellum Lilleengen is a Norwegian tennis player.
Helge Koll-Frafjord is a former tennis player from Norway.
Erling L'Orsa Tveit is a former tennis player from Norway.
Andreja Petrovic is a Norwegian tennis player.
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