1980 U.S. Clay Court Championships – Men's singles

Men's singles
1980 U.S. Clay Court Championships
Champion	José Luis Clerc
Runner-up	Mel Purcell
Score	7–5, 6–3

Eighth-seed José Luis Clerc claimed the title and first prize money of $28,000 by defeating qualifier Mel Purcell in the final.^[1]

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

	Quarterfinals							Semifinals							Final
	15	Terry Moor	3	0
	8	José Luis Clerc	6	6
								8	José Luis Clerc	6	6
								5	José Higueras	2	1
	10	Eliot Teltscher	3	6	3
	5	José Higueras	6	4	6
															8	José Luis Clerc	7	6
															Q	Mel Purcell	5	3
		Mario Martinez	7	6
	3	Eddie Dibbs	6	2
									Mario Martinez	1	3
								Q	Mel Purcell	6	6
	6	Wojciech Fibak	1	3
	Q	Mel Purcell	6	6

	First round							Second round							Third round							Quarterfinals
	1	G Mayer	6	6
		L Shiras	1	0				1	G Mayer	6	6
	Q	J Núñez	6	6				Q	J Núñez	2	2
		S Ball	3	1											1	G Mayer	2	3
		L Palin	6	7											16	T Moor	6	6
		Á Betancur	4	6					L Palin	3	1
		B Nealon	2	2				16	T Moor	6	6
	16	T Moor	6	6																		16	T Moor	3	0
	13	K Warwick	6	6																		8	JL Clerc	6	6
		S Glickstein	2	3				13	K Warwick	7	3	7
		F Maynetto	6	6					F Maynetto	6	6	5
		E Montaño	2	2											13	K Warwick	2	1
	Q	R Ycaza	6	6											8	JL Clerc	6	6
		C Dowdeswell	4	3				Q	R Ycaza	1	2
		S Simonsson	4	3				8	JL Clerc	6	6
	8	JL Clerc	6	6

	First round							Second round							Third round							Quarterfinals
	4	I Lendl	2	6	6
		R Cano	6	0	4			4	I Lendl	3	0
		C Freyss	6	6					C Freyss	6	6
		J Lloyd	1	2												C Freyss	2	4
		B Martin	6	6											10	E Teltscher	6	6
		B Willenborg	3	4					B Martin	2	3
		J Fillol	4	0				10	E Teltscher	6	6
	10	E Teltscher	6	6																		10	E Teltscher	3	6	3
	11	R Ramírez	4	6	4																	5	J Higueras	6	4	6
	Q	J Hayes	6	2	6			Q	J Hayes	7	6
	Q	R Vizcaíno	2	6	6			Q	R Vizcaíno	6	2
	Q	M Freeman	6	2	3										Q	J Hayes	5	6	1
		D Carter	6	6											5	J Higueras	7	3	6
		G Hardie	2	2					D Carter	6	2	0
		J Soares	1	5				5	J Higueras	2	6	6
	5	J Higueras	6	7

	First round							Second round							Third round							Quarterfinals
	7	H Gildemeister	4	0
	Q	JL Damiani	6	6				Q	JL Damiani	6	6
		M Cahill	6	6					M Cahill	3	4
		C Gattiker	3	3											Q	JL Damiani	2	2
		M Martinez	6	6												M Martinez	6	6
		J Kodeš	2	4					M Martinez	6	6
		P Kronk	6	7					P Kronk	3	0
	15	C Dibley	3	6																			M Martinez	7	6
	9	V Amaya	6	6																		3	E Dibbs	6	2
		C Owens	4	2				9	V Amaya	6	0	0
		P Hjertquist	6	7					P Hjertquist	4	6	6
		W Maher	3	5												P Hjertquist	1	1
		R Krishnan	6	6											3	E Dibbs	6	6
		G Masters	1	2					R Krishnan	2	2
		A Gómez	6	4	0			3	E Dibbs	6	6
	3	E Dibbs	3	6	6

	First round							Second round							Third round							Quarterfinals
	6	W Fibak	7	4	6
		V Winitsky	5	6	1			6	W Fibak	6	6
		M Edmondson	6	6					M Edmondson	2	2
		M Grant	3	4											6	W Fibak	6	6
		Ž Franulović	7	6												Ž Franulović	4	3
		R Case	5	1					Ž Franulović	3	6	6
	Q	G Aubone	6	5				12	P Dent	6	4	0
	12	P Dent	7	7																		6	W Fibak	1	3
	14	H Pfister	6	6																		Q	M Purcell	6	6
		J James	3	3				14	H Pfister	4	0
	Q	M Purcell	6	3				Q	M Purcell	6	6
		P Portes	0	0r											Q	M Purcell	4	6	6
		F Luna	7	1	6										2	H Solomon	6	0	2
		S Birner	6	6	1				F Luna	3	3
		R Fagel	2	4				2	H Solomon	6	6
	2	H Solomon	6	6