Men's singles
1973 Australian Open
Final
Champion	John Newcombe
Runner-up	Onny Parun
Score	6–3, 6–7, 7–5, 6–1
Details
Draw	56
Seeds	12
Events
Singles men women boys girls Doubles men women mixed boys girls WC Singles men women quad WC Doubles men women quad Legends men women mixed
← 1972 · Australian Open · 1974 →

John Newcombe defeated Onny Parun in the final, 6–3, 6–7, 7–5, 6–1 to win the men's singles tennis title at the 1973 Australian Open.

Ken Rosewall was the two-time defending champion, but lost in the second round to Karl Meiler.

The first round was best of 3 sets and the rest of the tournament was best of 5 sets.

The seeded players are listed below. John Newcombe is the champion; others show the round in which they were eliminated.

• Q = Qualifier

	Quarterfinals									Semifinals									Finals
		Karl Meiler	7	6	6	7
		Wanaro N'Godrella	6	7	3	6
											Karl Meiler	6	3	5	1
										12	Onny Parun	2	6	7	6
	4	Alex Metreveli	4	6	3	7	3
	12	Onny Parun	6	3	6	6	6
																			12	Onny Parun	3	7	5	1
																			2	John Newcombe	6	6	7	6
	11	Patrick Proisy	6	3	6	7
		John Cooper	4	6	1	6
										11	Patrick Proisy	6	4	2
										2	John Newcombe	7	6	6
	10	Bob Carmichael	4	6	3
	2	John Newcombe	6	7	6

	First round							Second round									Third round									Quarterfinals
								1	K Rosewall	2	3	2
		K Meiler	5	6	6				K Meiler	6	6	6
		J James	7	3	4													K Meiler	6	7	2	6
		T Kakoulia	7	7														T Kakoulia	3	6	6	3
	Q	R Machán	6	6					T Kakoulia	6	6	3	6
		S Ball	7	6					S Ball	2	4	6	3
		N Fraser	5	2																							K Meiler	7	6	6	7
																											W N'Godrella	6	7	3	6
								8	A Stone	6	6	6
	Q	M Phillips	6	6				Q	M Phillips	1	4	4
		J Kuki	3	4													8	A Stone	6	5	4	7	4
		W N'Godrella	6	6														W N'Godrella	3	7	6	5	6
		P Dent	3	4					W N'Godrella	6	7	7
		F Sedgman	4	6	2			9	B Phillips-Moore	4	6	6
	9	B Phillips-Moore	6	4	6

	First round							Second round									Third round									Quarterfinals
								4	A Metreveli	6	4	6	6
	Q	M Senior	6	3	14			Q	M Senior	2	6	2	2
		K Warwick	4	6	12												4	A Metreveli	4	6	6	7
		R Case	6	6														R Case	6	4	2	5
	Q	P Kronk	4	3					R Case	6	3	6	6
		F Gebert	7	4	6				F Gebert	4	6	4	2
		A McDonald	6	6	3																					4	A Metreveli	4	6	3	7	3
																										12	O Parun	6	3	6	6	6
								5	G Masters	6	6	6
		H-J Plötz	6	3	7				H-J Plötz	2	3	1
		J-F Caujolle	0	6	5												5	G Masters	6	6	3	5
	Q	C Kachel	6	6													12	O Parun	7	3	6	7
		W Bowrey	2	3				Q	C Kachel	1	2	2
		H Kary	4	6				12	O Parun	6	6	6
	12	O Parun	6	7

	First round							Second round									Third round									Quarterfinals
	11	P Proisy	7	3	6
	Q	W Durham	6	6	3			11	P Proisy	6	6	6
		W Coghlan	7	3	6				W Coghlan	3	3	4
		J Kamiwazumi	6	6	3												11	P Proisy	7	4	7	6
		P Dominguez	7	6														P Dominguez	5	6	6	4
		B Taróczy	6	3					P Dominguez	7	6	3	6	11
								6	J Alexander	6	7	6	3	9
																										11	P Proisy	6	3	6	7
		J Cooper	6	6																							J Cooper	4	6	1	6
		D Crealy	3	3					J Cooper	6	7	6
	Q	G Thomson	7	7				Q	G Thomson	3	6	1
		T Bernasconi	6	6														J Cooper	7	6	4	6	13
		B Giltinan	6	6														B Giltinan	5	2	6	7	11
		R Casey	1	2					B Giltinan	6	6	6	7
								3	M Anderson	7	2	2	6

	First round							Second round									Third round									Quarterfinals
	10	B Carmichael	6	6
		J Bartlett	4	2				10	B Carmichael	6	6	6	6
		J Stephens	6	3	8				J Stephens	1	2	7	3
	Q	L Elvstrøm	4	6	6												10	B Carmichael	6	6	2	1	6
		S Baranyi	6	6	6													S Baranyi	3	4	6	6	3
		C Stubs	7	3	2				S Baranyi	3	6	6	7
								7	C Dibley	6	3	3	6
																										10	B Carmichael	4	6	3
		C Letcher	6	7																						2	J Newcombe	6	7	6
		P Szőke	1	5					C Letcher	3	2	7	6
		G Goven	6	7					G Goven	6	6	6	7
		N Kelaidis	2	6														G Goven	1	3	3
		J-L Haillet	7	6													2	J Newcombe	6	6	6
		G Perkins	5	4					J-L Haillet	1	2	2
								2	J Newcombe	6	6	6

• Association of Tennis Professionals (ATP) – 1973 Australian Open Men's Singles draw
• 1973 Australian Open – Men's draws and results at the International Tennis Federation