First-seeded John Sadri defeated Tim Wilkison 6–4, 3–6, 6–3, 6–4 to win the 1980 Benson and Hedges Open singles competition. Wilkison was the defending champion.

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

• Q - Qualifier
• NB: The Final was the best of 5 sets while all other rounds were the best of 3 sets.

	Final
	1	John Sadri	6	3	6	6
	2	Tim Wilkison	4	6	3	4

	First round							Second round							Quarterfinals							Semifinals
	1	J Sadri	6	6
		F Krajcik	3	2				1	J Sadri	7	6
		D Carter	1	6	6				D Carter	6	3
	Q	P Lamb	6	1	4										1	J Sadri	6	6
		R Simpson	6	7												R Simpson	4	3
		C Gunning	2	5					R Simpson	6	6
	Q	R Evett	6	3	6			Q	R Evett	2	4
	7	M Mitchell	3	6	0																	1	J Sadri	6	6
	4	K Warwick	6	6																		5	R Frawley	1	3
		D Mustard	1	1				4	K Warwick	6	4	4
		J Austin	6	6					J Austin	4	6	6
		C Lewis	3	1												J Austin	6	4	5
		K Evernden	7	6											5	R Frawley	2	6	7
	Q	J Simpson	6	4					K Evernden	2	4
		J Harvey	1	1				5	R Frawley	6	6
	5	R Frawley	6	6

	First round							Second round							Quarterfinals							Semifinals
	6	P McNamee	6	6
		D Ditmer	2	3				6	P McNamee	7	7
		M Lewis	6	6					M Lewis	6	6
	Q	B Hibbert	4	3											6	P McNamee	3	6	3
		P Hampton	1	6	6										3	P Feigl	6	3	6
		B Gilmour	6	1	1				P Hampton	5	1
		C Stansbury	1	4				3	P Feigl	7	6
	3	P Feigl	6	6																		3	P Feigl	7	6	3
	8	D Collings	6	7																		2	T Wilkison	6	7	6
		B Derlin	2	6				8	D Collings	6	0	7
		D Crealy	6	6					D Crealy	4	6	9
		C England	3	3												D Crealy	2	6
		S Docherty	6	6											2	T Wilkison	6	7
		C Bradnam	2	4					S Docherty	6	2	2
		P Langsford	6	0				2	T Wilkison	2	6	6
	2	T Wilkison	7	6

• Association of Tennis Professional (ATP) – 1980 Men's Singles draw