Association of Tennis Professionals

The Association of Tennis Professionals (ATP) was formed in September 1972 by Donald Dell, Bob Briner, Jack Kramer, and Cliff Drysdale to protect the interests of male professional tennis players. Drysdale became the first President. Since 1990, the association has organized the worldwide tennis tour for men and linked the title of the tour with the organization's name. 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 was changed again and is now known as the ATP World Tour. 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, United Kingdom. ATP Americas is based in Ponte Vedra Beach, United States; ATP Europe is headquartered in Monaco; and ATP International, which covers Africa, Asia and Australasia, is based in Sydney, Australia.

The counterpart organization in the women's professional game is the Women's Tennis Association (WTA).

Andy Murray

Andrew Barron "Andy" Murray OBE (born 15 May 1987) is a Scottish professional tennis player, currently ranked World No. 2. He started playing tennis at the age of three, entered his first competitive tournament at age five and was playing league tennis by the time he was eight. He has reached at least the quarter-finals of all Grand Slam tournaments he has participated in since 2011, with the exception of the 2015 US Open. When he was 15, he moved to Barcelona to train at the Sánchez-Casal Academy. He won the junior US Open in 2004 and turned professional the following year. Murray has been ranked as British No. 1 since 27 February 2006. He achieved a top-10 ranking by the ATP for the first time on 16 April 2007, and reached a career peak of World No. 2 on 17 August 2009.

Novak Djokovic

Novak Djokovic (Serbian: Novak Đoković / Новак Ђоковић, pronounced [nôʋaːk d͡ʑôːkoʋit͡ɕ]; born 22 May 1987) is a Serbian professional tennis player who is currently ranked world No. 1 in men's singles tennis by the Association of Tennis Professionals (ATP). He is generally considered one of the greatest tennis players of all time. He is coached by former Slovak tennis player Marián Vajda and former German tennis player and six-time Grand Slam champion Boris Becker.

Djokovic has won 11 Grand Slam singles titles which is ranked fourth in the open era tied with Björn Borg and has held the No. 1 spot in the ATP rankings for a total of 186 weeks. By winning three Grand Slam titles in 2011, Djokovic became the sixth male player to win three Grand Slams in a calendar year. He repeated this achievement in 2015. In Grand Slams, Djokovic has won an all-time record six Australian Open titles (tied with Roy Emerson), including an open era record of three consecutive titles from 2011–2013 (the first and only player to achieve this). He has also won three Wimbledon titles and two US Open titles.