Brian Gottfried was the defending champion but lost in the quarterfinals to Johan Kriek.

Stan Smith won in the final 4–6, 7–6, 7–6, 6–3 against Balázs Taróczy.

	Semifinals							Final
	5	Johan Kriek	1	3
	3	Balázs Taróczy	6	6
								3	Balázs Taróczy	6	6	6	3
								4	Stan Smith	4	7	7	6
	4	Stan Smith	6	7
	2	Corrado Barazzutti	4	6

	First round							Second round							Quarterfinals							Semifinals
	1	B Gottfried	4	6	6
		J Kodeš	6	1	4			1	B Gottfried	6	3	6
		R Taylor	3	1					T Gullikson	2	6	4
		T Gullikson	6	6											1	B Gottfried	2	5
	Q	P Huťka	6	6											5	J Kriek	6	7
		P Feigl	3	3				Q	P Huťka	3	3
	Q	F Taygan	6	5	3			5	J Kriek	6	6
	5	J Kriek	2	7	6																	5	J Kriek	1	3
	3	B Taróczy	6	6																		3	B Taróczy	6	6
		S Birner	0	2				3	B Taróczy	6	2	7
		B Mitton	7	3	7				B Mitton	3	6	6
	Q	I Lendl	6	6	6										3	B Taróczy	7	6
		J Austin	6	6												J Austin	5	3
		P Kronk	4	2					J Austin	6	4	6
		V Pecci	5	3				8	K Meiler	4	6	4
	8	K Meiler	7	6

	First round							Second round							Quarterfinals							Semifinals
	7	J Fillol	4	4
		O N Bengtson	6	6					O N Bengtson	3	7	6
	Q	J Sadri	6	6				Q	J Sadri	6	6	2
		R Reininger	2	2												O N Bengtson	6	1
		A Muñoz	6	2	7										4	S Smith	7	6
		P Proisy	3	6	6				A Muñoz	1	2
		H Kary	3	2				4	S Smith	6	6
	4	S Smith	6	6																		4	S Smith	6	7
	6	T Šmíd	6	6																		2	C Barazzutti	4	6
		G Hardie	1	4				6	T Šmíd	3	6	6
		F McMillan	6	6	6				F McMillan	6	3	2
		R Lewis	3	7	2										6	T Šmíd	6	2	1
		C Letcher	6	6											2	C Barazzutti	2	6	6
		J James	3	4					C Letcher	5	5
		F González	4	7	0			2	C Barazzutti	7	7
	2	C Barazzutti	6	6	6

• 1978 Fischer-Grand Prix draw