1973 U.S. Professional Indoor – Singles

Singles
1973 U.S. Professional Indoor
Champion	Stan Smith
Runner-up	Robert Lutz
Score	7–6(7–2), 7–6(7–5), 4–6, 6–4
Draw	32
Seeds	12

Rod Laver was the defending champion, but lost in the quarterfinals this year.

Stan Smith won the title, defeating Robert Lutz 7–6^(7–2), 7–6^(7–5), 4–6, 6–4 in the final.

	Semifinals									Final
		Nikola Pilić	4	4	7	3
	7	Robert Lutz	6	6	5	6
										7	Robert Lutz	62	65	6	4
										3	Stan Smith	77	77	4	6
	3	Stan Smith	6	6	6
		Robert Maud	1	3	4

	First round							Second round							Quarterfinals							Semifinals
	2	C Dibley	6	3	6
		T Addison	3	6	3			2	C Dibley	66	6	6
		F McMillan	w/o						F McMillan	78	1	1
		C Drysdale													2	C Dibley	77	2	61
	6	R Emerson	6	6												N Pilić	62	6	77
		JE Mandarino	4	0				6	R Emerson	63	66
		B Phillips-Moore	1	3					N Pilić	77	78
		N Pilić	6	6																			N Pilić	4	4	7	3
	4	D Stockton	77	6																		7	R Lutz	6	6	5	6
		G Battrick	63	4				4	D Stockton	6	6
		M Holeček	5	4				11	H Solomon	3	2
	11	H Solomon	7	6											4	D Stockton	6	63	2
	7	R Lutz	77	6											7	R Lutz	4	77	6
		B Gottfried	62	3				7	R Lutz	6	4	6
		O Parun	6	1	78				O Parun	4	6	4
	9	A Stone	3	6	66

	First round							Second round							Quarterfinals							Semifinals
	12	T Edlefsen	61	7	68
		J Fillol	77	5	710				J Fillol	6	65	4
		P Cornejo	4	0				8	C Richey	3	77	6
	8	C Richey	6	6											8	C Richey	0	3
	10	P Dent	77	6											3	S Smith	6	6
		J McManus	63	3				10	P Dent	3	3
		R Barth	2	4				3	S Smith	6	6
	3	S Smith	6	6																		3	S Smith	6	6	6
		A Pattison	w/o																				R Maud	1	3	4
		B Hewitt							A Pattison	2	3
		R Maud	77	4	6				R Maud	6	6
	5	J Alexander	64	6	1											R Maud	6	4	78
		C Pasarell	77	6											1	R Laver	4	6	66
		F Froehling	62	2					C Pasarell	7	4	3
		ON Bengtson	5	1				1	R Laver	5	6	6
	1	R Laver	7	6

• Main draw