Singles
1975 U.S. Pro Indoor
Final
Champion	Marty Riessen
Runner-up	Vitas Gerulaitis
Score	7–6(7–1), 5–7, 6–2, 6–7(0–7), 6–3
Details
Draw	84
Seeds	16
Events
Singles Doubles
← 1974 · U.S. Pro Indoor · 1976 →

The 1975 U.S. Pro Indoor – Singles was an event of the 1975 U.S. Pro Indoor tennis tournament and was played on outdoor carpet courts at the Spectrum in Philadelphia, Pennsylvania in the United States from January 20 through January 26, 1975. The draw comprised 82 players and 16 of them were seeded. Second-seeded Rod Laver was the defending U.S. Pro Indoor singles champion but lost in the second round in this edition. Seventh-seeded Marty Riessen won the title by defeating unseeded Vitas Gerulaitis in the final, 7–6^(7–1), 5–7, 6–2, 6–7^(0–7), 6–3.

	Quarterfinals							Semifinals									Final
	16	Cliff Richey	2	66
		John Alexander	6	78
									John Alexander	4	61	3
									Vitas Gerulaitis	6	77	6
		Vitas Gerulaitis	7	6
		Paul Gerken	5	3
																		Vitas Gerulaitis	61	7	2	77	3
																	7	Marty Riessen	77	5	6	60	6
	5	Arthur Ashe	66	6	66
		Jaime Fillol	78	2	78
									Jaime Fillol	1	4	0
								7	Marty Riessen	6	6	6
	7	Marty Riessen	7	6
		Tony Roche	5	0

	First round							Second round							Third round							Fourth round
								1	B Borg	7	6
									T Kakoulia	5	4
															1	B Borg	1	4
																R Lutz	6	6
									R Lutz	6	1	6
									E van Dillen	4	6	4
																							R Lutz	6	2	3
																						16	C Richey	1	6	6
								16	C Richey	6	3	6
									K Johansson	4	6	3
															16	C Richey	65	7	77
																R Ruffels	77	5	63
									R Ruffels	6	6
									A Pattison	4	4

	First round							Second round							Third round							Fourth round
								6	S Smith	6	77
									R Simpson	2	64
															6	S Smith	66	3
																I El Shafei	78	6
									J McManus	3	5
									I El Shafei	6	7
																							I El Shafei	3	4
																							J Alexander	6	6
								15	E Dibbs	7	6
									A Panatta	5	3
															15	E Dibbs	4	0
																J Alexander	6	6
									J Hřebec	66	4
									J Alexander	78	6

	First round							Second round							Third round							Fourth round
								4	T Okker	6	6
									J Higueras	2	3
															4	T Okker	6	5	4
																V Gerulaitis	4	7	6
									V Gerulaitis	7	4	6
									ON Bengtson	5	6	1
																							V Gerulaitis	6	6
																						13	R Ramírez	3	0
								13	R Ramírez	6	66	6
									B Giltinan	4	78	1
															13	R Ramírez	6	4	6
		B Taróczy														C Pasarell	4	6	4
		C Pasarell	w/o						C Pasarell	6	6
		J Lloyd	6	6					J Lloyd	2	3
		R Emerson	3	4

	First round							Second round							Third round							Fourth round
	8	A Metreveli	3	6	64
		S Stewart	6	3	77				S Stewart	3	4
		P Gerken	1	7	5				P Gerken	6	6
		B Hewitt	6	5	2r											P Gerken	1	78	6
		V Amritraj	w/o													V Amritraj	6	66	2
		N Pilić							V Amritraj	6	77
		J Kamiwazumi	1	2					B Mottram	3	63
		B Mottram	6	6																			P Gerken	77	64	78
	10	D Stockton	6	6																			S Mayer	63	77	66
		R Case	1	1				10	D Stockton	4	7	2
		S Mayer	6	6					S Mayer	6	5	6
		P Bertolucci	1	4												S Mayer	6	78
		Ž Franulović	66	7	63											D Crealy	3	66
		D Crealy	78	5	77				D Crealy	4	77	6
		C Barazzutti	6	6					C Barazzutti	6	61	1
		S Krulevitz	4	4

	First round							Second round							Third round							Fourth round
		H Rahim	w/o
		V Zedník							H Rahim	3	6	4
		G Masters	2	4					B Gottfried	6	2	6
		B Gottfried	6	6												B Gottfried	6	4	7
		M Holeček	6	2	6										12	C Drysdale	2	6	5
		R Maud	1	6	2				M Holeček	5	6	4
		A Zugarelli						12	C Drysdale	7	4	6
	12	C Drysdale	w/o																				B Gottfried	4	7	2
		J Borowiak	w/o																			5	A Ashe	6	5	6
		P Barthès							J Borowiak	7	4	6
		M Cox	6	6					M Cox	5	6	3
		G Battrick	3	2												J Borowiak	3	7	4
		F McMillan	3	3											5	A Ashe	6	5	6
		R Reid	6	6					R Reid	3	1
		T Edlefsen	3	3				5	A Ashe	6	6
	5	A Ashe	6	6

	First round							Second round							Third round							Fourth round
		O Parun	w/o
		P Cornejo							O Parun	1	66
		B Fairlie	6	6					B Fairlie	6	78
		HJ Pohmann	0	1												B Fairlie	3	4
															14	T Gorman	6	6
									H Kary	62	0
								14	T Gorman	77	6
																						14	T Gorman	5	77	4
																							J Fillol	7	64	6
									J Fillol	w/o
									T Koch
																J Fillol	6	6
																R Moore	1	4
									R Moore	w/o
								3	G Vilas

	First round							Second round							Third round							Fourth round
									S Ball	7	6
									I Molina	5	2
																S Ball	4	6	6
															9	R Tanner	6	3	4
									P Dominguez	77	3	2
								9	R Tanner	64	6	6
																							S Ball	3	2
																						7	M Riessen	6	6
									M Estep	4	6	66
									D Dell	6	3	78
																D Dell	1	4
															7	M Riessen	6	6
									A Amritraj	1	3
								7	M Riessen	6	6

	First round							Second round							Third round							Fourth round
									C Dibley	2	3
									T Roche	6	6
																T Roche	77	6
															11	H Solomon	61	4
									G Stilwell	5	0
								11	H Solomon	7	6
																							T Roche	6	63	6
																							P Dent	4	77	4
									B Phillips-Moore	65	4
									A Stone	77	6
																A Stone	2	2
																P Dent	6	6
									P Dent	77	5	77
								2	R Laver	63	7	63

• Main draw