Men's singles
1984 US Open
Final
Champion	John McEnroe
Runner-up	Ivan Lendl
Score	6–3, 6–4, 6–1
Details
Draw	128
Seeds	16
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
← 1983 · US Open · 1985 →

John McEnroe defeated Ivan Lendl in the final, 6–3, 6–4, 6–1 to win the men's singles tennis title at the 1984 US Open. It was his fourth US Open singles title and seventh and last major singles title overall. It was Lendl's third consecutive runner-up finish at the US Open.

Jimmy Connors was the two-time defending champion, but was defeated by McEnroe in the semifinals, in the last match between the pair at a major singles tournament.

	Quarterfinals									Semifinals									Final
	1	John McEnroe	7	6	6
		Gene Mayer	5	3	4
										1	John McEnroe	6	4	7	4	6
										3	Jimmy Connors	4	6	5	6	3
	3	Jimmy Connors	7	6	6
		John Lloyd	5	2	0
																			1	John McEnroe	6	6	6
																			2	Ivan Lendl	3	4	1
	15	Pat Cash	7	6	2	6
	4	Mats Wilander	6	4	6	3
										15	Pat Cash	6	3	4	7	6
										2	Ivan Lendl	3	6	6	6	7
	5	Andrés Gómez	4	4	1
	2	Ivan Lendl	6	6	6

	First round									Second round									Third round									Fourth round
	1	J McEnroe	6	6	6
		C Dowdeswell	1	1	1					1	J McEnroe	6	6	6
		S Edberg	6	6	6						S Edberg	1	0	2
		L Stefanki	4	3	0														1	J McEnroe	6	6	6
		K Curren	7	3	6	6													Q	K Moir	3	0	3
		M Purcell	6	6	3	2					K Curren	w/o
	Q	K Moir	6	6	6					Q	K Moir
		S Giammalva, Jr.	4	3	3																							1	J McEnroe	6	6	6
		M Doyle	6	6	6																							Q	B Green	3	2	2
		R Tanner	2	2	4						M Doyle	7	7	3	3	5
		W Masur	3	4	6	6	6				J Fitzgerald	6	5	6	6	7
		J Fitzgerald	6	6	1	3	7													J Fitzgerald	6	4	3	6
		T Wilkison	3	6	6	6													Q	B Green	4	6	6	7
	Q	B Green	6	2	7	7				Q	B Green	6	7	6
	Q	H Schwaier	6	3	3	6	4			11	J Aguilera	4	6	3
	11	J Aguilera	4	6	6	4	6

	First round									Second round									Third round									Fourth round
	13	T Šmid	1	6	6	7
		R Seguso	6	1	4	5				13	T Šmid	7	6	6
		R Simpson	1	7	4	5					P McNamee	5	3	3
		P McNamee	6	5	6	7													13	T Šmid	4	6	7	6
		C Mezzadri	6	6	4	2														T Gullikson	6	4	6	4
		F González	4	7	6	6					F González	4	2	5
		T Gullikson	6	6	6						T Gullikson	6	6	7
		P Arraya	1	4	3																							13	T Šmid	3	2	3
	WC	M Leach	1	2	3																								G Mayer	6	6	6
		G Vilas	6	6	6						G Vilas	6	6	7
	WC	M Pernfors	3	4	4						S Colombo	3	1	5
		S Colombo	6	6	6															G Vilas	3	1	4
		G Mayer	7	6	6															G Mayer	6	6	6
		M Ostoja	5	3	1						G Mayer	6	6	6
		T Moor	6	4	6	6				6	J Arias	4	2	3
	6	J Arias	4	6	7	7

	First round									Second round									Third round									Fourth round
	3	J Connors	6	6	6
		M Mitchell	3	0	2					3	J Connors	6	6	6
		B Gottfried	7	6	6						B Gottfried	3	3	2
		B Testerman	5	2	3														3	J Connors	6	6	77
		H Leconte	2	6	6	6														H Leconte	4	1	62
		J Sadri	6	3	4	3					H Leconte	7	6	7
		L Bourne	3	2	4					Q	P Doohan	5	4	5
	Q	P Doohan	6	6	6																							3	J Connors	7	6	6
	Q	K Belcher	6	6	6	4	6																					16	J Nyström	6	0	3
		L Shiras	4	7	4	6	3			Q	K Belcher	3	6	3
		S Mayer	7	6	6	7					S Mayer	6	7	6
		C Motta	5	7	2	6														S Mayer	7	7	3	3	0
		P Annacone	6	4	4	4													16	J Nyström	5	5	6	6	6
		R Krishnan	3	6	6	6					R Krishnan	5	3	6
		R Acuña	2	2	0					16	J Nyström	7	6	7
	16	J Nyström	6	6	6

	First round									Second round									Third round									Fourth round
	9	H Sundström	7	2	6	6
		W Fibak	5	6	0	3				9	H Sundström	6	6	6
		M Edmondson	4	6	7	2	3				R Brown	1	2	0
		R Brown	6	4	6	6	6												9	H Sundström	7	6	5	6
		J Hlasek	7	3	2	3														S Perkiss	6	4	7	4
		S Perkiss	6	6	6	6					S Perkiss	6	6	6
	WC	L Duncan	4	1	3						T Giammalva	4	2	4
		T Giammalva	6	6	6																							9	H Sundström	6	4	4	2
	WC	P Dupre	2	6	4	6	1																						J Lloyd	4	6	6	6
		L Pimek	6	1	6	4	6				L Pimek	2	1	2
		J Lloyd	6	6	7						J Lloyd	6	6	6
		P Fleming	3	4	6															J Lloyd	2	7	6	6
	WC	D Goldie	3	6	1	6													7	J Kriek	6	6	2	3
		B Taróczy	6	3	6	7					B Taróczy	6	6	2	2
	Q	G Layendecker	6	2	0					7	J Kriek	4	7	6	6
	7	J Kriek	7	6	6

	First round									Second round									Third round									Fourth round
	8	A Krickstein	3	2	7	6	4
		B Manson	6	6	6	2	0r			8	A Krickstein	6	6	3	7
	Q	J Hayes	3	6	6	6				Q	J Klaparda	4	3	6	6
	Q	J Klaparda	6	7	3	7													8	A Krickstein	1	6	2	6
		G Forget	6	3	4	6	6													G Holmes	6	4	6	7
		G Holmes	2	6	6	3	7				G Holmes	6	6	7
		V Van Patten	4	6	6						T Högstedt	2	4	6
		T Högstedt	6	7	7																								G Holmes	6	3	1
		D Saltz	6	7	4	4	2																					15	P Cash	7	6	6
	Q	T Nelson	3	6	6	6	6			Q	T Nelson	6	6	7
		S Simonsson	4	6	4	7	6				S Simonsson	3	1	6
		R Harmon	6	3	6	6	2												Q	T Nelson	3	3	2
	Q	D Pate	4	0	2														15	P Cash	6	6	6
		B Gilbert	6	6	6						B Gilbert	3	4	2
	WC	I Năstase	3	5	1					15	P Cash	6	6	6
	15	P Cash	6	7	6

	First round									Second round									Third round									Fourth round
	10	E Teltscher	7	6	6	6
		H Günthardt	6	2	7	3				10	E Teltscher	3	6	2	6	7
		T Tulasne	6	6	4						M Dickson	6	4	6	3	6
		M Dickson	7	7	6														10	E Teltscher	4	3	4
	Q	L Palin	6	4	2	6	6													T Mayotte	6	6	6
		R Van't Hof	4	6	6	2	3			Q	L Palin	4	4	6	1
		C Lewis	4	3	1						T Mayotte	6	6	3	6
		T Mayotte	6	6	6																								T Mayotte	4	4	6
		M Davis	4	6	6	6																						4	M Wilander	6	6	7
	Q	J Gurfein	6	2	4	1					M Davis	4	3	5
		B Scanlon	6	6	6						B Scanlon	6	6	7
		B Willenborg	3	1	3															B Scanlon	6	5	3
	Q	H Simonsson	6	4	4														4	M Wilander	7	7	6
	WC	M Kures	7	6	6					WC	M Kures	6	3	4
		G Michibata	3	4	4					4	M Wilander	7	6	6
	4	M Wilander	6	6	6

	First round									Second round									Third round									Fourth round
	5	A Gómez	6	6	6
		S Glickstein	1	4	2					5	A Gómez	6	4	6	6
		R Argüello	6	5	5	4					M Bauer	0	6	3	2
		M Bauer	4	7	7	6													5	A Gómez	6	7	3	6
		D Pérez	7	4	2	2													Q	J Lapidus	3	5	6	3
	Q	J Lapidus	6	6	6	6				Q	J Lapidus	6	6	6
		V Winitsky	1	4	6	6	7				V Winitsky	3	3	4
		M Freeman	6	6	1	1	6																					5	A Gómez	6	7	6
	Q	K Flach	6	6	7	3	6																					12	V Gerulaitis	4	6	1
		M Westphal	3	7	5	6	3			Q	K Flach	6	7	6
		V Amritraj	7	6	6						V Amritraj	2	5	1
		F Buehning	5	3	4														Q	K Flach	4	2	6	7	1
		G Ocleppo	6	6	4	4	6												12	V Gerulaitis	6	6	4	6	6
		P Rebolledo	3	2	6	6	4				G Ocleppo	1	4	0
		D Tarr	3	3	3					12	V Gerulaitis	6	6	6
	12	V Gerulaitis	6	6	6

	First round									Second round									Third round									Fourth round
	14	A Järryd	6	7	6
		J Frawley	4	6	4					14	A Järryd	6	6	3	7	6
		T Gullikson	7	6	5	4	2				D Visser	7	3	6	5	3
		D Visser	6	2	7	6	6												14	A Järryd	6	6	6
		C Hooper	3	2	7	4														B Drewett	2	3	3
		S Davis	6	6	5	6					S Davis	4	3	2
		S Meister	1	6	6	4	4				B Drewett	6	6	6
		B Drewett	6	3	4	6	6																					14	A Järryd	2	2	4
		J Brown	6	6	6																							2	I Lendl	6	6	6
		D Stockton	4	3	2						J Brown	4	6	7	6
	Q	J Canter	4	3	4						S Denton	6	4	6	3
		S Denton	6	6	6															J Brown	1	2	4
		G Barbosa	7	1	4	7	3												2	I Lendl	6	6	6
		E Edwards	6	6	6	6	6				E Edwards	6	6	3	1
		B Teacher	4	4	5					2	I Lendl	3	7	6	6
	2	I Lendl	6	6	7

• Association of Tennis Professionals (ATP) – 1984 US Open Men's Singles draw
• 1984 US Open – Men's draws and results at the International Tennis Federation