Singles
1990 U.S. Men's Clay Court Championships
Final
Champion	David Wheaton
Runner-up	Mark Kaplan
Score	6–4, 6–3
Details
Draw	32
Seeds	8
Events
Singles Doubles
← 1989 · U.S. Men's Clay Court Championships · 1991 →

Jay Berger was the defending champion, but did not participate this year.

David Wheaton won the title, defeatingMark Kaplan 6–4, 6–3 in the final.

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

Key

	First round							Second round							Quarterfinals							Semifinals							Final
	1	R Reneberg	6	7
	Q	T Mercer	4	6				1	R Reneberg	4	2
		A Mronz	6	6					A Mronz	6	6
	WC	R Van't Hof	3	3												A Mronz	6	6
	Q	A Aramburú	0	2											7	D Rostagno	3	2
		R Weiss	6	6					R Weiss	5	3
		M Nido	1	1				7	D Rostagno	7	6
	7	D Rostagno	6	6																			A Mronz	6	5	2
	3	D Wheaton	3	6	7																	3	D Wheaton	2	7	6
		R Matuszewski	6	1	5			3	D Wheaton	1	6	7
		B Shelton	0	3				Q	C Campbell	6	3	5
	Q	C Campbell	6	6											3	D Wheaton	6	6	7
		C Garner	6	7												J Tarango	2	7	6
	Q	D Goldberg	4	6					C Garner	4	5
		J Tarango	6	6					J Tarango	6	7
	6	L Duncan	3	4																									3	David Wheaton	6	6
	5	D Goldie	3	6	3																									Mark Kaplan	4	4
		M Kaplan	6	3	6				M Kaplan	6	6
		J Brown	1	2					D Pate	3	3
		D Pate	6	6												M Kaplan	6	6
	WC	J Ross	3	3												T Wilkison	4	2
		J Rive	6	6					J Rive	1	3
		T Wilkison	6	6					T Wilkison	6	6
	4	S Davis	3	2																			M Kaplan	6	6
	WC/8	M Washington	6	6																		WC/8	M Washington	2	3
		L Shiras	2	1				WC/8	M Washington	2	6	6
		L Lavalle	6	6					L Lavalle	6	3	2
		B Dyke	3	1											WC/8	M Washington	6	4	6
		M Wostenholme	6	6												M Wostenholme	4	6	3
		D Cassidy	2	1					M Wostenholme	6	6
		B Pearce	6	6					B Pearce	2	3
	2	J Grabb	1	4

• Singles draw

• 1990 U.S. Men's Clay Court Championships

• Use mdy dates from August 2023
• Articles with short description
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