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.
Patrick William McEnroe is an American former professional tennis player, broadcaster, and former captain of the United States Davis Cup team.
Luiz Mattar is a former professional tennis player from Brazil.
Andrei Stanislavovich Olhovskiy is a former tennis player from Russia, who turned professional in 1989.
Donald James "Don" Johnson is an American former professional tennis player who reached the World No. 1 doubles ranking in 2002. Although born in Bethlehem, Pennsylvania, he was raised and learned the sport of tennis in the Pittsburgh suburb of Mt. Lebanon, Pennsylvania. Johnson attended Fairview High School in Erie, Pennsylvania, and won the PIAA State Singles Championship in 1984. During his career, he won the Wimbledon men's doubles title in 2001, and the Wimbledon mixed doubles title in 2000. He also won the doubles title at the Tennis Masters Cup in 2000. He won a total of 23 top-level doubles titles.
The Lebanon men's national tennis team represents Lebanon in Davis Cup tennis competition and are governed by the Fédération Libanaise de Tennis.
Brad Drewett was an Australian tennis player and ATP official. He was the 1975 and 1977 Australian Open junior champion and the youngest player at age 17 to win the title since Ken Rosewall and John Newcombe. He was also the third-youngest Australian Open quarterfinalist in his first Grand Slam appearance, at 17 years 5 months in 1975, behind Boris Becker, 17 years 4 days in 1984 and Goran Ivanišević, 17 years 4 months in 1989.
Bai Yan is a Chinese male tennis player.
Philippe Washer was a Belgian tennis player. He competed in the Davis Cup a number of times, from 1946 to 1961. He was ranked world No. 8 in 1957.
Zhu Benqiang is a former professional tennis player from the People's Republic of China.
Xia Jiaping is a former professional tennis player from the People's Republic of China.
Giovani Samaha is a Lebanese tennis player.
Benjamin Hassan is a Lebanese-German tennis player. He has a career high ATP singles ranking of world No. 293, achieved on 12 August 2019.
Hady Habib is an American-born Lebanese tennis player. Habib has a career high ATP singles ranking of 408 and a career-high ATP doubles ranking of 960. Habib has won 8 ITF Futures singles title and 4 ITF Futures doubles title. Habib has represented Lebanon at the Davis Cup, where he has a win–loss record of 15–5 in singles and a 4–5 record in doubles. Habib also graduated with a degree in Sports Management from Texas A&M University in College Station.
Matheus Pucinelli de Almeida is a Brazilian tennis player.
Yang Jingzhu is a Chinese former professional tennis player.
Andrian Raturandang is an Indonesian former professional tennis player. He was a gold medalist for Indonesia at the 1997 Southeast Asian Games.
Gao Wan is a Chinese former professional tennis player.
Patrick Chucri is a Lebanese former professional tennis player. He represented Lebanon in the Davis Cup from 2002 to 2014, 2005 Mediterranean Games in Almeria, Spain and the 2006 Asian Games in Doha, Qatar.
Bassam Beidas is a British-born Lebanese former professional tennis player.
Australia 
Lebanon