Singles
1973 Holton Tennis Classic
Final
Champion	Stan Smith
Runner-up	Rod Laver
Score	6–4, 3–6, 6–4
Details
Draw	32
Seeds	12
Events
Singles Doubles
← 1972 · St. Louis WCT · 1974 →

The 1973 Holton Tennis Classic – Singles was an event of the 1973 Holton Tennis Classic men's tennis tournament that was played at the Kiel Auditorium in St. Louis, Missouri in the United States from March 26 through April 1, 1973. The draw comprised 36 players and 12 of them were seeded. John Newcombe was the defending champion but did not compete in this edition. Second-seeded Stan Smith won the singles title, defeating first-seeded Rod Laver in the final, 6–4, 3–6, 6–4 and earned $10,000 first-prize money.^[1][2]

	Semifinals							Final
	1	Rod Laver	6	6
	9	Nikola Pilić	3	3
								1	Rod Laver	4	6	4
								2	Stan Smith	6	3	6
		Cliff Drysdale	3	3
	2	Stan Smith	6	6

	First Round							Second Round							Quarterfinals							Semifinals
	1	Rod Laver	6	6
		Onny Parun	3	4				1	Rod Laver	6	77
		Roy Barth	6	0	6				Roy Barth	2	60
		Milan Holeček	3	6	3										1	Rod Laver	6	3	6
		Patricio Cornejo	1	3												Gerald Battrick	3	6	2
		Ove Bengtson	6	6					Ove Bengtson	3	6	3
		Gerald Battrick	7	3	6				Gerald Battrick	6	4	6
	5	Dick Stockton	5	6	3																	1	Rod Laver	6	6
	8	Cliff Richey	6	4	6																	9	Nikola Pilić	3	3
		Charlie Pasarell	1	6	4			8	Cliff Richey	6	77
		Jim McManus	6	6					Jim McManus	3	62
	12	Bob Maud	2	3											8	Cliff Richey	6	65	64
	9	Nikola Pilić	6	6											9	Nikola Pilić	4	77	77
		José Edison Mandarino	0	1				9	Nikola Pilić	6	6
		Brian Gottfried	4	6	710				Brian Gottfried	2	3
	3	Roy Emerson	6	4	68

	First Round							Second Round							Quarterfinals							Semifinals
	4	Bob Lutz	6	6
		Butch Buchholz	3	2				4	Bob Lutz	6	6
		Terry Addison	0	4				10	Phil Dent	3	2
	10	Phil Dent	6	6											4	Bob Lutz	1	3
		Frew McMillan	1	1												Cliff Drysdale	6	6
		Allan Stone	6	6					Allan Stone	4	63
		Cliff Drysdale	6	79					Cliff Drysdale	6	77
	6	Colin Dibley	4	67																			Cliff Drysdale	3	3
	7	John Alexander	6	6																		2	Stan Smith	6	6
		Andrew Pattison	3	4				7	John Alexander	6	77
	11	Jaime Fillol	6	6				11	Jaime Fillol	4	64
		Barry Phillips-Moore	2	4											7	John Alexander	6	0	61
		Tom Edlefsen	1	63											2	Stan Smith	4	6	77
		Frank Froehling	6	77					Frank Froehling	4	0
		Harold Solomon	2	4				2	Stan Smith	6	6
	2	Stan Smith	6	6

• ITF tournament edition details