Singles
1920 Australasian Championships
Champion	Pat O'Hara Wood
Runner-up	Ronald Thomas
Score	6–3, 4–6, 6–8, 6–1, 6–3
Draw	26

Pat O'Hara Wood defeated Ronald Thomas 6–3, 4–6, 6–8, 6–1, 6–3 in the final to win the men's singles tennis title at the 1920 Australasian Championships.

Draw

Key

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

	Quarterfinals									Semifinals									Finals
	Pat O'Hara Wood		6	6	6
	H. Utz		1	1	2					Pat O'Hara Wood		6	6	7
	A. Roy Taylor		3	3	6	6	6			A. Roy Taylor		3	1	5
	A. Scott		6	6	2	2	3												Pat O'Hara Wood		6	4	6	6	6
	Ronald Thomas		6	6	6														Ronald Thomas		3	6	8	1	3
	G. O'Dea		0	2	4					Ronald Thomas		6	4	6	5	6
	Horace Rice		6	6	6					Horace Rice		4	6	1	7	2
	C. Gurner		2	2	2

Top half

	First round									Second round									Quarterfinals									Semifinals
											P. O'Hara Wood	6	6	6
		K. Roberts	9	6	2	0	6				K. Roberts	0	2	2
		R. Berriman	7	1	6	6	2													P O'Hara Wood	6	6	6
		H. Utz	6	6	5	3	11													H. Utz	1	1	2
		J. Penny	4	4	7	6	9				H. Utz	6	6	6
											R. Paxton	2	1	1
																													P O'Hara Wood	6	6	7
		A. R. Taylor	7	6	6	5	6																						A. R. Taylor	3	1	5
		E. Jordan	9	3	3	7	3				A. R. Taylor	6	6	9	6
		E. Rowe	6	8	6						E. Rowe	2	4	11	3
		G Hone	3	6	2															A. R. Taylor	6	6	2	2	6
		A. Scott	8	6	6															A. Scott	3	3	6	6	3
		E. Hicks	6	2	4						A. Scott	6	4	6	6
											R. Billing	4	6	3	4

Bottom half

	First round									Second round									Quarterfinals									Semifinals
		R. Thomas	w/o
		E. Richmond									R. Thomas	6	8	6
		S. Milligan	6	6	6						S. Milligan	2	6	0
		F. Bromley	2	2	1															R. Thomas	6	6	6
		G. O'Dea	6	6	6															G. O'Dea	0	2	4
		T. Linn	2	0	4						G. O'Dea	6	1	6	6
											F. Hone	1	6	2	3
																													R. Thomas	6	4	6	5	6
		H. Rice	6	6	6																								H. Rice	4	6	1	7	2
		C. Stuart	3	2	2						H. Rice	7	6	6
		J. O'Dea	6	6	9						J. O'Dea	5	1	1
		A. Pittman	0	2	7															H. Rice	6	6	6
																				C. Gurner	2	2	2
											C. Gurner	6	7	7
											F. Barritt	1	5	5

External links

• Grand Slam Tennis Archive – Australasian Open 1920
• Source for the draw at ausopen.com