Adrian Quist defeated Jack Crawford (tennis), Jack Crawford 6–3, 6–1, 6–2 in the final to win the men's singles tennis title at the 1940 Australian Championships.

Seeds

The seeded players are listed below. Adrian Quist is the champion; others show the round in which they were eliminated. # John Bromwich ''(semifinals)'' # Adrian Quist ''(champion)'' # Harry Hopman ''(quarterfinals)'' # Jack Crawford (tennis), Jack Crawford ''(finalist)'' # Vivian McGrath ''(semifinals)'' # Max Newcombe ''(quarterfinals)'' # Bill Sidwell ''(quarterfinals)'' # Jack Harper (tennis), Jack Harper ''(second round)''

Draw

Key

* Q = Qualifier (tennis), Qualifier * WC = wild card (tennis), Wild card * LL = Lucky loser * r = Retired (tennis), Retired

Finals

Earlier rounds

Section 1

Section 2

External links

* {{DEFAULTSORT:Australian Championships - Men's Singles,1940 1940 in Australian tennis Australian Championships (tennis) by year – Men's singles, 1950 1940 Australian Championships, Men's Singles