1973 Australian Open – Men's singles

John Newcombe defeated Onny Parun in the final, 6–3, 6–7, 7–5, 6–1 to win the men's singles tennis title at the 1973 Australian Open.

Ken Rosewall was the two-time defending champion, but lost in the second round to Karl Meiler.

The first round was best of 3 sets and the rest of the tournament was best of 5 sets.

Seeds
The seeded players are listed below. John Newcombe is the champion; others show the round in which they were eliminated.


 * 1) 🇦🇺 Ken Rosewall (second round)
 * 2) 🇦🇺 John Newcombe (champion)
 * 3) 🇦🇺 Mal Anderson (second round)
 * 4)  Alex Metreveli (quarterfinals)
 * 5) 🇦🇺 Geoff Masters (third round)
 * 6) 🇦🇺 John Alexander (second round)
 * 7) 🇦🇺 Colin Dibley (second round)
 * 8) 🇦🇺 Allan Stone (third round)
 * 9) 🇦🇺 Barry Phillips-Moore (second round)
 * 10) 🇦🇺 Bob Carmichael (quarterfinals)
 * 11) 🇫🇷 Patrick Proisy (semifinals)
 * 12) 🇳🇿 Onny Parun (final)

Key

 * Q = Qualifier