The 1973 Australian Open was a tennis tournament played on outdoor grass courts at the Kooyong Stadium in Melbourne in Australia and was held from 26 December 1972 to 1 January 1973. It was the 61st edition of the Australian Open and the first Grand Slam tournament of the year.
John Newcombe defeated Onny Parun, 6–3, 6–7, 7–5, 6–1 
- It was Newcombe's 5th career Grand Slam title, and his 1st Australian Open title.
Margaret Court defeated Evonne Goolagong Cawley, 6–4, 7–5 
John Newcombe / Malcolm Anderson defeated John Alexander / Phil Dent, 6–3, 6–4, 7–6 
Margaret Court / Virginia Wade defeated Kerry Harris / Kerry Melville Reid, 6–4, 6–4