Singles
1980 ABN World Tennis Tournament
Final
Champion	Heinz Günthardt
Runner-up	Gene Mayer
Score	6–2, 6–4
Details
Draw	32
Seeds	8
Events
Singles Doubles
← 1979 · ABN World Tennis Tournament · 1981 →

Björn Borg was the defending champion of the singles event at the ABN World Tennis Tournament, but did not participate in this edition. Unseeded Heinz Günthardt won the title after a victory in the final against first-seeded Gene Mayer 6–2, 6–4.^[1]

	Semifinals							Final
	1	Gene Mayer	6	6	6
		Paul McNamee	7	3	1
								1	Gene Mayer	2	4
									Heinz Günthardt	6	6
	4	Ivan Lendl	6	6	3
		Heinz Günthardt	4	7	6

	First round							Second round							Quarterfinals							Semifinals
	1	Gene Mayer	6	6
		Peter McNamara	0	1
								1	Gene Mayer	6	6
									Brian Teacher	2	4
		Jean-François Caujolle	2	4
		Brian Teacher	6	6
															1	Gene Mayer	6	6
																Chris Delaney	4	4
	WC	Marc Albert	6	4	5
		Chris Delaney	4	6	7
									Chris Delaney	1	6	7
								6	Adriano Panatta	6	3	5
		Butch Walts	6	6	4
	6	Adriano Panatta	1	7	6
																						1	Gene Mayer	6	6	6
																							Paul McNamee	7	3	1
	3	Stan Smith	2	2
		Paul McNamee	6	6
									Paul McNamee	6	6
									Georges Goven	4	4
	Q	Paul van Min	5	5
		Georges Goven	7	7
																Paul McNamee	6	6
															7	Vijay Amritraj	3	4
		Buster Mottram	6	6
	WC	Eric Wilborts	3	0
									Buster Mottram	7	3	3
								7	Vijay Amritraj	6	6	6
		Bernard Fritz	4	3
	7	Vijay Amritraj	6	6

	First round							Second round							Quarterfinals							Semifinals
	LL	Bernard Boileau	6	2	6
		Frew McMillan	3	6	3
								LL	Bernard Boileau	3	6	3
									Ilie Năstase	6	2	6
		Bill Scanlon	6	1
		Ilie Năstase	7	6
																Ilie Năstase	5	1
															4	Ivan Lendl	7	6
		Colin Dibley	6	4
		Terry Rocavert	1	1	r
									Colin Dibley	2	1
								4	Ivan Lendl	6	6
		Gianni Ocleppo	3	4
	4	Ivan Lendl	6	6
																						4	Ivan Lendl	6	6	3
																							Heinz Günthardt	4	7	6
	5	Tim Gullikson	3	4
		Johan Kriek	6	6
									Johan Kriek	4	0
									Heinz Günthardt	6	6
		Leo Palin	5	3
		Heinz Günthardt	7	6
																Heinz Günthardt	7	5	6
															2	John Sadri	6	7	2
		Louk Sanders	6	7
		Carlos Kirmayr	4	5
									Louk Sanders	2	2
								2	John Sadri	6	6
		Hank Pfister	4	4
	2	John Sadri	6	6

• ITF tournament edition details