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

Margaret Court defeated Evonne Goolagong, 6–4, 7–5