John Marks

John M. P. Marks (born 9 December 1952) is a former professional tennis player from Australia.

Marks won the ILTF Western Australian Championships on grass in 1978 at Perth defeating Mark Edmondson, Chris Kachel, and Bob Carmichael in a marathon five set final. Marks would finish as runner-up in the same event in 1979 losing the final to Edmondson.

Marks is best remembered for finishing runner-up in singles at the 1978 Australian Open, defeating Arthur Ashe in the semifinals. In the final, he lost in four sets to Vilas. "Vilas displayed magnificent court coverage and his adept use of the top spin lob worried Marks." As a result of this slam final appearance, he achieved his career-high singles ranking of world No. 44, after entering the tournament ranked No. 177.

Marks never won a Grand Slam singles title during his career, but won 7 doubles titles and reached the semifinals of the men's doubles at the 1978 US Open. As a junior, Marks won the Australian Open boys' doubles in 1971, partnering Michael Phillips.

Career finals Singles (2 runners-up ) ResultW/L YearTournamentSurfaceOpponentScoreLoss 0–1 1975 Sydney Outdoor, Australia Grass Ross Case 2–6, 1–6Loss 0–2 1978 Australian Open, Melbourne Grass Guillermo Vilas 4–6, 4–6, 6–3, 3–6

Doubles (7 titles, 7 runner-ups)

Grand Slam tournament performance timeline

Singles Note: The Australian Open was held twice in 1977, in January and December.