# 1923 Australasian Championships – Men's singles

Pat O'Hara Wood defeated Bert St. John 6–1, 6–1, 6–3 in the final to win the men's singles tennis title at the 1923 Australian Championships.

## Draw
### Key

* Q = Qualifier
* WC = Wild card
* LL = Lucky loser
* r = Retired
| Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Semifinals | Semifinals | Semifinals | Semifinals | Semifinals | Semifinals | Finals | Finals | Finals | Finals | Finals |
| Pat O'Hara Wood | Pat O'Hara Wood | 6 | 6 | 6 | | | | | | | | | | | | | |
| F.J. Cory | F.J. Cory | 0 | 4 | 1 | | | Pat O'Hara Wood | Pat O'Hara Wood | 6 | 6 | 6 | | | | | | |
| E. Jordan | E. Jordan | 5 | 3 | 6 | 6 | 7 | E. Jordan | E. Jordan | 1 | 1 | 1 | | | | | | |
| L. Oxenham | L. Oxenham | 7 | 6 | 3 | 4 | 5 | | | | | | | Pat O'Hara Wood | Pat O'Hara Wood | 6 | 6 | 6 |
| Horace Rice | Horace Rice | 6 | 6 | 6 | | | | | | | | | Bert St. John | Bert St. John | 1 | 1 | 3 |
| C. Ferguson | C. Ferguson | 2 | 2 | 2 | | | Horace Rice | Horace Rice | 7 | 6 | 5 | 3 | | | | | |
| Dudley Bullough | Dudley Bullough | 4 | 2 | 2 | | | Bert St. John | Bert St. John | 9 | 3 | 7 | 6 | | | | | |
| Bert St. John | Bert St. John | 6 | 6 | 6 | | | | | | | | | | | | | |

### Top half

| First round | First round | First round | First round | Second round | Second round | Second round | Second round | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Semifinals | Semifinals | Semifinals | Semifinals |
| | | | | P. O'Hara Wood | 6 | 6 | 6 | | | | | | | | | | |
| | | | | W. Smith | 1 | 2 | 1 | | | | | | | | | | |
| | | | | | | | | P. O'Hara Wood | 6 | 6 | 6 | | | | | | |
| | | | | | | | | F.J. Cory | 0 | 4 | 1 | | | | | | |
| | | | | F.J. Cory | 6 | 6 | 6 | | | | | | | | | | |
| | | | | Wormall | 2 | 2 | 4 | | | | | | | | | | |
| | | | | | | | | | | | | | | P. O'Hara Wood | 6 | 6 | 6 |
| E. Jordan | 8 | 6 | 6 | | | | | | | | | | | E. Jordan | 1 | 1 | 1 |
| C. Moon | 6 | 2 | 2 | E. Jordan | 6 | 8 | 6 | | | | | | | | | | |
| H.M. Turner | 6 | 6 | 6 | H. Turner | 1 | 6 | 2 | | | | | | | | | | |
| Nelson | 3 | 1 | 3 | | | | | E. Jordan | 5 | 3 | 6 | 6 | 7 | | | | |
| | | | | | | | | L. Oxenham | 7 | 6 | 3 | 4 | 5 | | | | |
| | | | | L. Oxenham | bye | | | | | | | | | | | | |

### Bottom half

| First round | First round | First round | First round | First round | Second round | Second round | Second round | Second round | Second round | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Semifinals | Semifinals | Semifinals | Semifinals | Semifinals |
| H. Rice | 7 | 6 | 4 | 6 | | | | | | | | | | | | | | |
| L. Terry | 5 | 2 | 6 | 1 | H. Rice | 4 | 6 | 6 | 7 | | | | | | | | | |
| L. Plane | 6 | 6 | 6 | | L. Plane | 6 | 0 | 4 | 5 | | | | | | | | | |
| A. North | 4 | 4 | 1 | | | | | | | H. Rice | 6 | 6 | 6 | | | | | |
| | | | | | | | | | | C. Ferguson | 2 | 2 | 2 | | | | | |
| | | | | | C. Ferguson | 6 | 1 | 7 | 6 | | | | | | | | | |
| | | | | | N. Green | 1 | 6 | 5 | 2 | | | | | | | | | |
| | | | | | | | | | | | | | | H. Rice | 7 | 6 | 5 | 3 |
| | | | | | | | | | | | | | | C. B. St. John | 9 | 3 | 7 | 6 |
| | | | | | D. Bullough | 7 | 6 | 7 | | | | | | | | | | |
| | | | | | A. Illingworth | 5 | 2 | 5 | | | | | | | | | | |
| | | | | | | | | | | D. Bullough | 4 | 2 | 2 | | | | | |
| | | | | | | | | | | C. B. St. John | 6 | 6 | 6 | | | | | |
| | | | | | C. B. St. John | 6 | 6 | 6 | | | | | | | | | | |
| | | | | | Ferrier | 0 | 2 | 4 | | | | | | | | | | |