1940 Australian Championships – Men's singles
# 1940 Australian Championships – Men's singles

Adrian Quist defeated 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 (finalist)
* Vivian McGrath (semifinals)
* Max Newcombe (quarterfinals)
* Bill Sidwell (quarterfinals)
* Jack Harper (second round)

## Draw

### Key

* Q = Qualifier
* WC = Wild card
* LL = Lucky loser
* r = Retired

### Finals

| Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Semifinals | Semifinals | Semifinals | Semifinals | Semifinals | Final | Final | Final | Final | Final |
| - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
| 1 | John Bromwich | 7 | 6 | 6 | | | | | | | | | | | |
| | Dinny Pails | 5 | 0 | 0 | | | | | | | | | | | |
| | Dinny Pails | 5 | 0 | 0 | | 1 | John Bromwich | 4 | 1 | 7 | | | | | |
| | | | | | | 4 | Jack Crawford | 6 | 6 | 9 | | | | | |
| 4 | Jack Crawford | 6 | 6 | 7 | | 4 | Jack Crawford | 6 | 6 | 9 | | | | | |
| 6 | Max Newcombe | 3 | 0 | 5 | | | | | | | | | | | |
| 6 | Max Newcombe | 3 | 0 | 5 | | | | | | | 4 | Jack Crawford | 3 | 1 | 2 |
| | | | | | | | | | | | 2 | Adrian Quist | 6 | 6 | 6 |
| 2 | Adrian Quist | 6 | 11 | 6 | 6 | | | | | | | | | | | 2 | Adrian Quist | 6 | 6 | 6 |
| 7 | Bill Sidwell | 3 | 13 | 3 | 2 | | | | | | | | | | |
| 7 | Bill Sidwell | 3 | 13 | 3 | 2 | 2 | Adrian Quist | 6 | 10 | 6 | | | | | |
| | | | | | | 5 | Vivian McGrath | 4 | 8 | 3 | | | | | |
| 3 | Harry Hopman | 8 | 1 | 5 | 2 | 5 | Vivian McGrath | 4 | 8 | 3 | | | | | |
| 5 | Vivian McGrath | 6 | 6 | 7 | 6 | | | | | | | | | | |

### Earlier rounds

**Section 1**

| First round | First round | First round | First round | First round | First round | Second round | Second round | Second round | Second round | Second round | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Semifinals | Semifinals | Semifinals | Semifinals | Semifinals |
| - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
| 1 | Bromwich | 6 | 6 | 6 | | | | | | | | | | | | | | | | |
| | Compain | 0 | 2 | 1 | | 1 | Bromwich | 6 | 6 | 6 | | | | | | | | | | |
| | Hancock | w/o | | | | | Hancock | 3 | 0 | 1 | | | | | | | | | | |
| | Thompson | | | | | | | | | | 1 | Bromwich | 7 | 6 | 6 | | | | | |
| 8 | Harper | 6 | 7 | 6 | 8 | | | | | | | Pails | 5 | 0 | 0 | | | | | |
| | Huxley | 0 | 9 | 3 | 6 | 8 | Harper | 2 | 3 | 5 | | | | | | | | | | |
| | Pails | 6 | 6 | 6 | | | Pails | 6 | 6 | 7 | | | | | | | | | | |
| | Diggle | 1 | 1 | 2 | | | | | | | | | | | | 1 | Bromwich | 4 | 1 | 7 |
| 4 | Crawford | 6 | 6 | 6 | | | | | | | | | | | | 4 | Crawford | 6 | 6 | 9 |
| | Strohfeldt | 0 | 2 | 4 | | 4 | Crawford | 6 | 6 | 6 | | | | | | | | | | |
| | Long | 6 | 6 | 6 | | | Long | 3 | 4 | 3 | | | | | | | | | | |
| | Murray | 1 | 1 | 0 | | | | | | | 4 | Crawford | 6 | 6 | 7 | | | | | |
| 6 | Newcombe | 6 | 6 | 6 | | | | | | | 6 | Newcombe | 3 | 0 | 5 | | | | | |
| | Yon | 1 | 3 | 2 | | 6 | Newcombe | 6 | 6 | 6 | | | | | | | | | | |
| | Lindo | 6 | 9 | 7 | | | Lindo | 4 | 3 | 2 | | | | | | | | | | |
| | McDermott | 1 | 7 | 5 | | | | | | | | | | | | | | | | |

**Section 2**

| First round | First round | First round | First round | First round | First round | Second round | Second round | Second round | Second round | Second round | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Semifinals | Semifinals | Semifinals | Semifinals | Semifinals |
| - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
| 2 | Quist | 6 | 6 | 6 | | | | | | | | | | | | | | | | | |
| | Barnes | 2 | 3 | 2 | | 2 | Quist | 6 | 6 | 6 | | | | | | | | | | | |
| | Gilchrist | 2 | 6 | 6 | 9 | | Gilchrist | 3 | 3 | 3 | | | | | | | | | | | |
| | Cummings | 6 | 3 | 4 | 7 | | | | | | 2 | Quist | 6 | 11 | 6 | 6 | | | | | |
| 7 | Sidwell | 6 | 6 | 6 | | | | | | | 7 | Sidwell | 3 | 13 | 3 | 2 | | | | | |
| | Harrison | 2 | 3 | 1 | | 7 | Sidwell | 10 | 6 | 6 | | | | | | | | | | | |
| | Bonner | 6 | 6 | 6 | | | Bonner | 8 | 2 | 4 | | | | | | | | | | | |
| | Whillans | 4 | 3 | 2 | | | | | | | | | | | | | 2 | Quist | 6 | 10 | 6 |
| 3 | Hopman | 6 | 7 | 6 | | | | | | | | | | | | | 5 | McGrath | 4 | 8 | 3 |
| | Felan | 4 | 5 | 4 | | 3 | Hopman | 6 | 6 | 6 | | | | | | | | | | | |
| | Bennett | 6 | 6 | 4 | 6 | | Bennett | 1 | 0 | 2 | | | | | | | | | | | |
| | Liddle | 1 | 2 | 6 | 1 | | | | | | 3 | Hopman | 8 | 1 | 5 | 2 | | | | | |
| 5 | McGrath | 6 | 6 | 6 | | | | | | | 5 | McGrath | 6 | 6 | 7 | 6 | | | | | |
| | Lean | 1 | 1 | 4 | | 5 | McGrath | 6 | 6 | 6 | | | | | | | | | | | |
| | Turnbull | 6 | 3 | 6 | 6 | | Turnbull | 2 | 1 | 1 | | | | | | | | | | | |
| | Callaghan | 1 | 6 | 2 | 2 | | | | | | | | | | | | | | | | |
