1927 U.S. National Championships – Men's singles

Men's singles
1927 U.S. National Championships
Champion	René Lacoste[1]
Runner-up	Bill Tilden[1]
Score	11–9, 6–3, 11–9
Draw	64
Seeds	16

Defending champion René Lacoste defeated Bill Tilden in the final, 11–9, 6–3, 11–9 to win the men's singles tennis title at the 1927 U.S. National Championships.^[2] It was Lacoste's second U.S. Championships singles title and fifth major singles title overall.^[3]

The tournament used two lists of eight players for seeding the men's singles event; one list of U.S. players and one for foreign players. René Lacoste is the champion; others show in brackets the round in which they were eliminated.

	Quarterfinals									Semifinals									Final
		Bill Tilden	6	3	10	6
		Jean Borotra	1	6	8	1
											Bill Tilden	14	6	4	9
											Frank Hunter	12	1	6	7
		Frank Hunter	4	5	6	6	6
		John Hennessey	6	7	0	3	4
																				Bill Tilden	9	3	9
																				René Lacoste	11	6	11
		Bill Johnston	3	6	6	6
		Jacques Brugnon	6	2	4	4
											Bill Johnston	2	6	4	1
											René Lacoste	6	2	6	6
		Manuel Alonso	2	6	4	1
		René Lacoste	6	2	6	6

	First round									Second round									Third round									Quarterfinals
	1	Tilden	6	10	7
		Mercur	3	8	5					1	Tilden	6	6	6
	Hyde		w/	o							Bell	2	2	2
	Bell																		1	Tilden	4	6	11	6
	Griffin		3	8	6	6														Griffin	6	1	9	0
	Hubbell		6	6	4	4					Griffin	6	6	6
		Griffin	6	5	2	6	3			(7)	Ohta	0	2	2
	(7)	Ohta	2	7	6	3	6																					1	Tilden	6	3	10	6
	8	Doeg	8	3	6	2																						(3)	Borotra	1	6	8	1
		Appel	10	6	3	6				Appel		6	5	0
	Lang		6	4	4	6	6			Lang		8	7	6
	Anderson		1	6	6	0	3													Lang	6	6	3	1	3
	Gilpin		5	3	6														(3)	Borotra	2	4	6	6	6
	Thalheimer		7	6	3	rtd.					Gilpin	4	6	8	5
		Toba	6	6	2	3	0			(3)	Borotra	6	8	6	7
	(3)	Borotra	3	2	6	6	6

	First round									Second round									Third round									Quarterfinals
	4	Hunter	6	8	3	6
		Seligson	1	6	6	2				4	Hunter	6	9	6
	Chandler										Chandler	2	7	4
	Allison		w/	o															4	Hunter	7	6	6
	Evans		0	1	1														(5)	Washer	5	3	3
	Coggeshall		6	6	6						Coggeshall	4	0	2
		Coen	w/	o						(5)	Washer	6	6	6
	(5)	Washer																										4	Hunter	4	5	6	6	6
	6	Williams	w/	o																									Hennessey	6	7	0	3	4
		Herndon								Herndon		4	1	2
	Baur		3	4	2					Hennessey		6	6	6
	Hennessey		6	6	6															Hennessey	6	6	4	3	6
	Feibleman		6	6	6														(2)	Cochet	4	4	6	6	1
	Onda		4	3	4						Feibleman	4	6	7	0
		Kynaston	3	5	3					(2)	Cochet	6	8	5	6
	(2)	Cochet	6	7	6

	First round									Second round									Third round									Quarterfinals
	2	Johnston	7	6	7
		King	5	3	5					2	Johnston	6	6	7
	Olhausen		6	7	4						Marsh	1	4	5
	Marsh		8	9	6														2	Johnston	6	6	6
	Williams		w/	o															(6)	Wright	4	4	4
	Leslie										Leslie	5	1	9	1
		Mooney	0	4	2					(6)	Wright	7	6	7	6
	(6)	Wright	6	6	6																							2	Johnston	3	6	6	6
	7	White	7	3	1	0																						(4)	Brugnon	6	2	4	4
		Jones	5	6	6	6				Jones		6	6	6
	Fischer		6	3	6	6	6			Fischer		1	1	2
	Shields		3	6	2	8	3													Jones	7	6	6	1	1
	Strachan		4	6	6	6													(4)	Brugnon	9	4	3	6	6
	Sidney Wood		6	3	4	2					Strachan	0	1	2
		Mangin	4	5	3					(4)	Brugnon	6	6	6
	(4)	Brugnon	6	7	6

	First round									Second round									Third round									Quarterfinals
	3	Alonso	5	8	6	6
		Hall	7	6	4	3				3	Alonso	6	4	6	6
	Washburn		5	6	5	6	6				Washburn	2	6	3	2
	Weiner		7	1	7	0	0												3	Alonso	5	3	6	6	6
	Van Ryn		6	6	3	6														Van Ryn	7	6	1	4	0
	Johnson		4	4	6	4				Van Ryn		4	6	7	8
		Bowman	6	6	6					Bowman		6	2	5	6
	(8)	Miki	4	1	2																							3	Alonso	8	4	1	2
	5	Lott	w/	o																								(1)	Lacoste	6	6	6	6
		Behr								Behr		3	3	2
	Harada		6	6	6					Harada		6	6	6
	Orser		1	3	1															Harada	3	4	3
	Nunns		4	6	3	6	6												(1)	Lacoste	6	6	6
	Sullivan		6	4	6	0	3				Nunns	0	2	4
		Owens	4	4	2					(1)	Lacoste	6	6	6
	(1)	Lacoste	6	6	6