John David Newcombe AO OBE (born 23 May 1944) is an Australian former professional tennis player.

He was the Australian junior champion from 1961 to 1963 and was a member of Australia's Davis Cup winning team in 1964.

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 was the top ranked amateur in the world in 1967 according to Lance Tingay, World Tennis[3] and an Ulrich Kaiser panel of 13 experts[4] and was the first recipient of the Martini and Rossi award after finishing top of their points system in 1967.

[16] Newcombe was guaranteed $135,000 annually, which was higher than what the best paid baseball player received that year.

[17] As a member of the WCT professional tour group and the Players' Union, Newcombe was banned by the International Tennis Federation from competing in the 1972 Wimbledon Championships and he joined the ATP boycott of the event in 1973.