1966 U.S. National Championships – Men's singles

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

1. Manuel Santana (semifinals)
2. Roy Emerson (semifinals)
3. Dennis Ralston (fourth round)
4. Tony Roche (third round)
5. Arthur Ashe (third round)
6. Cliff Drysdale (third round)
7. Clark Graebner (quarterfinals)
8. Cliff Richey (second round)

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

	Quarterfinals									Semifinals									Final
	1	Manuel Santana	6	6	8	5	6
		Bill Bowrey	8	2	6	7	4
										1	Manuel Santana	3	4	8	6
											John Newcombe	6	6	6	8
		Mark Cox	6	1	6	2	1
		John Newcombe	3	6	3	6	6
																				John Newcombe	6	10	3	4
																				Fred Stolle	4	12	6	6
	7	Clark Graebner	3	4	2
		Fred Stolle	6	6	6
											Fred Stolle	6	6	6
										2	Roy Emerson	4	1	1
		Owen Davidson	12	4	3	2
	2	Roy Emerson	10	6	6	6

	First round									Second round									Third round									Fourth round
	1	Santana	6	6	6
		Berli	1	1	2					1	Santana	6	6	6
		Tutvin	3	6	6	6					Tutvin	1	1	3
		Mangan	6	2	1	1													1	Santana	3	6	6	8
		Moore	6	6	6															Moore	6	2	3	6
		Darrah	2	4	1						Moore	6	6	6
		Reese	6	6	7						Reese	4	2	2
		Rosello	1	4	5																							1	Santana	9	9	8
		Tym	1	6	6	6																							McKinley	7	7	6
		Sweeney	6	1	4	2					Tym	2	3	4
		McKinley	6	6	6						McKinley	6	6	6
		Bovett	4	1	1															McKinley	6	6	6
		Marcin	7	9	6															Carrero	2	4	0
		Yang	5	7	1						Marcin	2	4	6	4
		Carrero	6	7	6						Carrero	6	6	3	6
		Sack	3	5	4

	First round									Second round									Third round									Fourth round
	6	Drysdale	6	6	6
		Gorman	3	3	1					6	Drysdale	6	6	6
		Cantin	9	1	3	6	7				Cantin	3	2	3
		Kovaleski	7	6	6	1	5												6	Drysdale	1	6	6
		Bowrey	6	6	6															Bowrey	6	8	8
		Mudd	1	0	0						Bowrey	6	6	6
		Scott	6	6	6						Scott	4	3	4
		Sullivan	3	3	4																								Bowrey	6	6	6
		Subirats	6	6	2	3	6																						Osborne	3	2	4
		Seewagen	3	4	6	6	3				Subirats	6	3	9	6	6
		De Gronckel	2	6	6	6					De Gronckel	4	6	11	3	0
		Lambert	6	4	4	2														Subirats	7	8	2	1
		Osborne	6	6	6	21														Osborne	9	6	6	6
		Buchholz	8	3	3	19					Osborne	6	6	7
		Beust	6	6	6						Beust	3	4	5
		Watson	2	3	4

	First round									Second round									Third round									Fourth round
	4	Roche	6	6	6
		Lara	4	3	4					4	Roche	6	8	6	8
		Stewart	14	7	2	3	6				Stewart	4	10	3	6
		Villarete	12	5	6	6	3												4	Roche	8	4	5
		Seixas	6	6	2	2	6													Cox	10	6	7
		Smith	3	4	6	6	4				Seixas	3	6	3
		Cox	6	6	6						Cox	6	8	6
		Stockton	4	2	2																								Cox	10	6	7
		Obando	7	6	3	7																							Crookenden	8	4	5
		Estep	5	4	6	5					Obando	0	4	1
		Jackson	9	6	3	6					Jackson	6	6	6
		Steele III	7	1	6	0														Jackson	4	6	2	2
		Crookenden	6	6	8	5	6													Crookenden	6	4	6	6
		Avoyer	2	2	10	7	4				Crookenden	1	6	5	6	6
		McManus	7	6	6						McManus	6	3	7	4	4
		Pasarell	5	4	2

	First round									Second round									Third round									Fourth round
	5	Ashe	15	6	6
		Roemer	3	2	0					5	Ashe	8	4	6	6
		Holmberg	6	6	6						Holmberg	6	6	3	4
		Cromwell	4	2	4														5	Ashe	2	3	4
		Newcombe	8	3	6	6														Newcombe	6	6	6
		Pickens	6	6	0	4					Newcombe	6	16	6
		Ryan	6	6	6						Ryan	3	14	4
		Pressly	1	1	2																								Newcombe	9	5	6	6	6
		Bungert	6	6	6																								Bungert	11	7	2	2	2
		Sprengelmeyer	1	2	4						Bungert	9	6	8
		Fillol	6	6	4	6					Fillol	7	3	6
		Fishbach	2	4	6	3														Bungert	6	6	6
		McKinley	3	6	2	6	6													Tacchini	0	0	1
		Montgomery	6	4	6	2	4				McKinley	2	r
		Tacchini	10	6	6	6					Tacchini	1
		Lumsden	12	2	3	2

	First round									Second round									Third round									Fourth round
		Dell	6	6	6	6
		Kesl	8	1	0	1					Dell	6	6	3	6
		Guerry	6	6	3	7					Guerry	4	4	6	0
		Olmedo	4	4	6	5														Dell	7	3	8	4
		Loyo-Mayo	4	6	6	6														Stilwell	5	6	10	6
		Stone	6	4	2	3					Loyo-Mayo	3	2	6
		Stilwell	6	6	6						Stilwell	6	6	8
		Glass	0	4	3																								Stilwell	11	6	3	5
		Power	16	6	6																							7	Graebner	9	8	6	7
		Cheney	14	3	4						Power	6	6	6
		Schloss	6	6	6						Schloss	0	4	1
		Spannagel	4	2	2															Power	4	2	6	1
		Leach	6	3	2	11	8												7	Graebner	6	6	3	6
		Dell	3	6	6	9	6				Leach	2	2	3
	7	Graebner	6	7	6					7	Graebner	6	6	6
		Guzmán	2	5	2

	First round									Second round									Third round									Fourth round
		Stolle	6	6	6
		Gorski	2	4	4						Stolle	6	6	6
		Barth	6	6	6						Barth	4	1	4
		Kourides	3	1	0															Stolle	10	6	8
		Carpenter	6	2	6	6	6													Contet	8	2	6
		Brown	8	6	0	4	2				Carpenter	4	6	2
		Contet	6	6	6						Contet	6	8	6
		Howe	4	2	3																								Stolle	7	6	9
		Beck	6	6	6																							3	Ralston	5	3	7
		Carrington	2	1	1						Beck	5	2	5
		Osuna	4	6	4	6	6				Osuna	7	6	7
		Barnes	6	4	6	4	4													Osuna	1	4	3
		Mulligan	4	6	6	6													3	Ralston	6	6	6
		Karp	6	2	3	2					Mulligan	1	4	3
	3	Ralston	6	6	7					3	Ralston	6	6	6
		Singh	1	3	5

	First round									Second round									Third round									Fourth round
		Neely	10	4	6	4	8
		Zuleta	8	6	4	6	6				Neely	1	6	3
		Ruffels	6	6	6						Ruffels	6	8	6
		Scwitters	1	0	0															Ruffels	3	10	6	6
		Froehling	6	6	6															Froehling	6	8	4	3
		Tully	3	3	1						Froehling	6	6	6
		Van Lingen	4	7	6	5	6				Van Lingen	1	1	2
		Howe	6	5	3	7	3																						Ruffels	6	2	1	1
		Powless	6	6	6																								Davidson	3	6	6	6
		Conner	4	3	4						Powless	1	3	4
		García	6	2	6	3	12				García	6	6	6
		Russell	3	6	4	6	10													García	1	4	0
		Davidson	6	6	6															Davidson	6	6	6
		Howard	0	4	3						Davidson	7	8	6
	8	Richey	6	6	6					8	Richey	5	6	1
		Jennings	3	2	3

	First round									Second round									Third round									Fourth round
		Buding	6	6	6
		Tidball	1	4	3						Buding	6	6	8	2	4
		Keldie	2	2	6	10	6				Keldie	8	1	6	6	6
		Siska	6	6	0	8	1													Keldie	3	1	4
		Oehrlein	8	6	6															Riessen	6	6	6
		Rombeau	6	4	2						Oehrlein	1	2	4
		Riessen	6	7	7						Riessen	6	6	6
		Lutz	4	5	5																								Riessen	6	3	5	3
		Leonard																										2	Emerson	2	6	7	6
		Olvera	w/o								Leonard	4	3	2
		Gerrard	1	6	3	6	6				Gerrard	6	6	6
		Hoehn	6	3	6	3	2													Gerrard	0	4	1
		Harrison	6	1	8	11	13												2	Emerson	6	6	6
		Darley	3	6	10	9	11				Harrison	6	1	6	2
	2	Emerson	6	9	9					2	Emerson	4	6	8	6
		El Shafei	3	7	7

• 1966 U.S. National Championships on ITFtennis.com Archived 2016-03-22 at the Wayback Machine, the source for this draw
• Association of Tennis Professionals (ATP) – 1966 U.S. Championships men's singles draw