Singles
1991 U.S. Men's Clay Court Championships
Champion	Jaime Yzaga
Runner-up	Jimmy Arias
Score	6–3, 7–5
Draw	32
Seeds	8

David Wheaton was the defending champion, but lost in the quarterfinals this year.

Jaime Yzaga won the title, defeating Jimmy Arias 6–3, 7–5 in the final.

Seeds

A champion seed is indicated in bold text while text in italics indicates the round in which that seed was eliminated.

Draw

Key

• Q = Qualifier
• WC = Wild card
• LL = Lucky loser
• Alt = Alternate
• SE = Special exempt
• PR = Protected ranking
• ITF = ITF entry
• JE = Junior exempt
• w/o = Walkover
• r = Retired
• d = Defaulted
• SR = Special ranking

	First round							Second round							Quarterfinals							Semifinals							Final
	1	M Chang	6	7
		N Kroon	0	5				1	M Chang	65	6	7
		B Shelton	6	6					B Shelton	77	4	5
		S Pescosolido	2	2											1	M Chang	60	1
		A Sznajder	1	6	4										7	J Yzaga	77	6
	Q	J Brown	6	3	6			Q	J Brown	4	4
		C Garner	66	3				7	J Yzaga	6	6
	7	J Yzaga	78	6																		7	J Yzaga	7	6
	3	D Wheaton	6	6																			M Washington	5	2
		C Adams	4	3				3	D Wheaton	6	6
	WC	J Pugh	1	3					P Korda	3	4
		P Korda	6	6											3	D Wheaton	77	1	2
	WC	R Leach	1	64												M Washington	63	6	6
		M Washington	6	77					M Washington	6	6
		C Saceanu	6	3	6				C Saceanu	3	4
	6	S Davis	1	6	0																								7	Jaime Yzaga	6	7
	5	J Arias	6	6																									5	Jimmy Arias	3	5
		T Högstedt	3	3				5	J Arias	6	6
		J Tarango	4	2					D Pérez	1	4
		D Pérez	6	6											5	J Arias	6	6
	WC	M Pernfors	4	4											4	R Reneberg	4	2
	Q	M Wostenholme	6	6				Q	M Wostenholme	6	0	3
	Q	R Viver	4	5				4	R Reneberg	4	6	6
	4	R Reneberg	6	7																		5	J Arias	3	6	7
	8	D Pate	6	3	63																	Q	J Frana	6	3	5
		B Pearce	3	6	77				B Pearce	4	2
		B Garrow	63	3				Q	J Frana	6	6
	Q	J Frana	77	6											Q	J Frana	6
		D Nargiso	6	77												P Arraya	4	r
		K Evernden	2	63					D Nargiso	6	4	63
		P Arraya	77	6					P Arraya	2	6	77
	2	D Rostagno	63	3

External links

• Singles draw