John David Newcombe, AO, OBE (born 23 May 1944 in Sydney) is a former tennis player from Australia who won seven Grand Slam singles titles and an all-time record 17 doubles titles. He is one of the few men to have been ranked world No. 1 in both singles and doubles. He also contributed to five Davis Cup titles for Australia during an age when Davis Cup was deemed as significant as the Grand Slams.Tennis Magazine ranked Newcombe the 10th best male player of the period 1965–2005.
A natural athlete, Newcombe played several sports as a boy until devoting himself to tennis. He was the Australian junior champion from 1961 to 1963 and was a member of Australia's Davis Cup winning team in 1964. He won his first Grand Slam title in 1965 by taking the Australian Championships doubles title with fellow Australian Tony Roche. That same year, the duo won the Wimbledon doubles title. They teamed to win the Australian doubles championship three more times, Wimbledon another four times and the US Championships in 1967, the French Championships in 1967, and the French Open in 1969. They won 12 Grand Slam titles, which remained the all-time record for a men's doubles team until 2013, when it was surpassed by Bob and Mike Bryan.
Newcombe's powerful serve and volley was the backbone of his attacking game. He frequently came up with a second-serve ace. He was the top ranked amateur in the world in 1967 according to Lance Tingay, although Rex Bellamy ranked him second behind Roy Emerson. As a professional, Newcombe was the joint world No. 1 player in 1970 and 1971. In singles play, he was a two-time winner of the Australian Open, a three-time winner of Wimbledon, and a two-time winner of the US Open.
Overall, he won 26 Grand Slam titles in singles, doubles, and mixed doubles (27 if his 1965 mixed doubles shared win is added).
Newcombe and Rod Laver are the only players to ever win both the US Open and Wimbledon men's singles titles as an amateur and as a professional. The grass surfaces favoured his game, and the French Open's clay surface was the only major singles championship he never won. However, he did take the French doubles title on three occasions.
Still active in tennis, he was made captain of Australia's Davis Cup team in 1995.
In 2001 he was revealed to be President George W. Bush's drinking companion on the night of 4 September 1976, when Bush was charged with driving under the influence. This controversy surfaced during the 2000 US Presidential Election.