# 1925 Australasian Championships – Men's singles

First-seeded James Anderson defeated Gerald Patterson 11–9, 2–6, 6–2, 6–3 in the final to win the men's singles tennis title at the 1925 Australasian Championships.

## Seeds

The seeded players are listed below. James Anderson is the champion; others show the round in which they were eliminated.
* James Anderson (champion)
* Gerald Patterson (finalist)
* Pat O'Hara Wood (semifinals)
* Norman Peach (quarterfinals)
* Fred Kalms (quarterfinals)
* Bob Schlesinger (semifinals)
* Gar Hone (quarterfinals)
* Jack Cummings (second round)

## Draw
### Key

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

### Finals

| Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Semifinals | Semifinals | Semifinals | Semifinals | Semifinals | Semifinals | Finals | Finals | Finals | Finals | Finals | Finals |
| 2 | Gerald Patterson | 6 | 6 | 9 | | | | | | | | | | | | |
| | Aubrey Willard | 0 | 2 | 7 | 2 | Gerald Patterson | 6 | 4 | 6 | 6 | | | | | | |
| 4 | Norman Peach | 3 | 2 | 2 | 6 | Bob Schlesinger | 4 | 6 | 4 | 4 | | | | | | |
| 6 | Bob Schlesinger | 6 | 6 | 6 | | | | | | | 2 | Gerald Patterson | 9 | 6 | 2 | 3 |
| 1 | James Anderson | 6 | 6 | 8 | | | | | | | 1 | James Anderson | 11 | 2 | 6 | 6 |
| 7 | Gar Hone | 2 | 0 | 6 | 1 | James Anderson | 6 | 6 | 6 | | | | | | | |
| 3 | Pat O'Hara Wood | 6 | 6 | 6 | 3 | Pat O'Hara Wood | 2 | 3 | 3 | | | | | | | |
| 5 | Fred Kalms | 3 | 2 | 3 | | | | | | | | | | | | |

### 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 | Second round | Second round | Third round | Third round | Third round | Third round | Third round | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals |
| 2 | Patterson | 6 | 6 | 6 | | | | | | | | | | | | | | | | | | |
| | Chave | 0 | 1 | 2 | | 2 | Patterson | 6 | 6 | 6 | | | | | | | | | | | | |
| | Goodman | 4 | 6 | 6 | 7 | | Goodman | 0 | 2 | 4 | | | | | | | | | | | | |
| | E. Hatherley | 6 | 1 | 4 | 5 | | | | | | | | 2 | Patterson | 6 | 6 | 6 | | | | | |
| | Roberts | 6 | 6 | 6 | | | | | | | | | | Roberts | 3 | 3 | 2 | | | | | |
| | Trounce | 4 | 4 | 3 | | | Roberts | w/o | | | | | | | | | | | | | | |
| | | | | | | | Marsh | | | | | | | | | | | | | | | |
| | | | | | | | | | | | | | | | | | | 2 | Patterson | 6 | 6 | 9 |
| 8 | Cummings | 7 | 7 | 6 | | | | | | | | | | | | | | | A. Willard | 0 | 2 | 7 |
| | Ashcroft | 5 | 5 | 1 | | 8 | Cummings | 4 | 3 | 3 | | | | | | | | | | | | |
| | J. Willard | 6 | 9 | 6 | | | J. Willard | 6 | 6 | 6 | | | | | | | | | | | | |
| | Oxenham | 1 | 7 | 1 | | | | | | | | | | J. Willard | | | | | | | | |
| | A. Willard | 6 | 6 | 6 | | | | | | | | | | A. Willard | w/o | | | | | | | |
| | Bulcock | 4 | 1 | 2 | | | A. Willard | 8 | 6 | 2 | 6 | 6 | | | | | | | | | | |
| | McDougall | 6 | 6 | 7 | | | McDougall | 10 | 1 | 6 | 1 | 2 | | | | | | | | | | |
| | Fitchett | 3 | 2 | 5 | | | | | | | | | | | | | | | | | | |

#### Section 2

| First round | First round | First round | First round | First round | First round | First round | Second round | Second round | Second round | Second round | Second round | Third round | Third round | Third round | Third round | Third round | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals |
| 4 | N. Peach | 6 | 6 | 6 | | | | | | | | | | | | | | | | | |
| | Cryle | 1 | 0 | 4 | | | 4 | N. Peach | 6 | 6 | 6 | | | | | | | | | | |
| | Smith | 6 | 6 | 6 | | | | Smith | 1 | 2 | 2 | | | | | | | | | | |
| | W. J. Baldock | 0 | 2 | 0 | | | | | | | | 4 | N. Peach | 6 | 6 | 6 | | | | | |
| | | | | | | | | | | | | | Blaxland | 3 | 3 | 2 | | | | | |
| | | | | | | | | Blaxland | 6 | 10 | 7 | | | | | | | | | | |
| | Coram | 5 | 7 | 3 | 7 | 6 | | Coram | 2 | 8 | 5 | | | | | | | | | | |
| | James | 7 | 5 | 6 | 5 | 3 | | | | | | | | | | | 4 | N. Peach | 3 | 2 | 2 |
| 6 | Schlesinger | 6 | 6 | | | | | | | | | | | | | | 6 | Schlesinger | 6 | 6 | 6 |
| | Gibbes | 4 | 3 | r | | | 6 | Schlesinger | 6 | 6 | 6 | | | | | | | | | | |
| | Williams | 6 | 6 | 9 | | | | Williams | 3 | 1 | 2 | | | | | | | | | | |
| | B. B. Loel | 3 | 1 | 7 | | | | | | | | 6 | Schlesinger | 6 | 6 | 6 | | | | | |
| | Carmichael | 8 | 6 | 6 | | | | | | | | | Carmichael | 4 | 1 | 3 | | | | | |
| | L. Gibson | 6 | 4 | 3 | | | | Carmichael | 6 | 6 | 6 | | | | | | | | | | |
| | | | | | | | | Lamb | 4 | 1 | 3 | | | | | | | | | | |

#### Section 3

| First round | First round | First round | First round | First round | First round | First round | Second round | Second round | Second round | Second round | Second round | Second round | Second round | Third round | Third round | Third round | Third round | Third round | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals |
| 1 | Anderson | 6 | 6 | 6 | | | | | | | | | | | | | | | | | | | |
| | C. Moon | 0 | 0 | 0 | | | 1 | Anderson | 6 | 6 | 6 | | | | | | | | | | | | |
| | Caldwell | 6 | 6 | 6 | | | | Caldwell | 2 | 2 | 4 | | | | | | | | | | | | |
| | Dunlop | 4 | 4 | 4 | | | | | | | | | | 1 | Anderson | 6 | 6 | 7 | | | | | |
| | | | | | | | | | | | | | | | Bullough | 0 | 1 | 5 | | | | | |
| | | | | | | | | Moxon | 3 | 1 | 3 | | | | | | | | | | | | |
| | Bullough | 6 | 6 | 4 | 8 | | | Bullough | 6 | 6 | 6 | | | | | | | | | | | | |
| | Berriman | 4 | 2 | 6 | 6 | | | | | | | | | | | | | | 1 | Anderson | 6 | 6 | 8 |
| 7 | Hone | 8 | 6 | 7 | | | | | | | | | | | | | | | 7 | Hone | 2 | 0 | 6 |
| | Baker | 6 | 2 | 5 | | | 7 | Hone | 6 | 2 | 6 | 4 | 9 | | | | | | | | | | |
| | Fitzgerald | 0 | 2 | 6 | 6 | 6 | | Fitzgerald | 2 | 6 | 3 | 6 | 7 | | | | | | | | | | |
| | F. Peach | 6 | 6 | 4 | 2 | 4 | | | | | | | | 7 | Hone | 6 | 6 | 6 | | | | | |
| | Garvin | 6 | 6 | 3 | 6 | | | | | | | | | | G. Moon | 4 | 0 | 3 | | | | | |
| | Berckelman | 0 | 2 | 6 | 0 | | | Garvin | 3 | 1 | 0 | | | | | | | | | | | | |
| | G. Moon | 6 | 6 | 1 | 8 | | | G. Moon | 6 | 6 | 6 | | | | | | | | | | | | |
| | E. M. Ladyman | 1 | 3 | 6 | 6 | | | | | | | | | | | | | | | | | | |

#### Section 4

| First round | First round | First round | First round | First round | First round | First round | Second round | Second round | Second round | Second round | Second round | Second round | Second round | Third round | Third round | Third round | Third round | Third round | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals |
| 3 | O'Hara Wood | 6 | 6 | 6 | | | | | | | | | | | | | | | | | | | |
| | A. G. Illingworth | 2 | 1 | 1 | | | 3 | O'Hara Wood | 6 | 4 | 4 | 7 | 6 | | | | | | | | | | |
| | Gemmell | 7 | 6 | 6 | | | | Gemmell | 1 | 6 | 6 | 5 | 2 | | | | | | | | | | |
| | Coldham | 5 | 0 | 4 | | | | | | | | | | 3 | O'Hara Wood | 6 | 6 | 6 | | | | | |
| | Colvin | 6 | 6 | 6 | | | | | | | | | | | Colvin | 3 | 0 | 0 | | | | | |
| | D. B. Reid | 4 | 3 | 4 | | | | Colvin | 6 | 6 | 6 | | | | | | | | | | | | |
| | Poulton | 6 | 6 | 5 | 12 | | | Poulton | 4 | 4 | 4 | | | | | | | | | | | | |
| | Turner | 0 | 4 | 7 | 10 | | | | | | | | | | | | | | 3 | O'Hara Wood | 6 | 6 | 6 |
| 5 | Kalms | 6 | 6 | 6 | | | | | | | | | | | | | | | 5 | Kalms | 3 | 2 | 3 |
| | Wertheim | 1 | 3 | 2 | | | 5 | Kalms | 6 | | | | | | | | | | | | | | |
| | Treloar | 10 | 6 | 5 | 9 | 6 | | Treloar | 2 | r | | | | | | | | | | | | | |
| | Medcalf | 8 | 4 | 7 | 11 | 2 | | | | | | | | 5 | Kalms | 7 | 2 | | | | | | |
| | Haege | 6 | 6 | 10 | | | | | | | | | | | Haege | 5 | 1$^r$ | | | | | | |
| | V. J. Cornell | 4 | 2 | 8 | | | | Haege | 4 | 6 | 6 | 6 | 6 | | | | | | | | | | |
| | | | | | | | | Spencer | 6 | 2 | 8 | 2 | 4 | | | | | | | | | | |