Jarkko Nieminen defeated Mario Ančić 6–2, 6–2 to win the 2006 Heineken Open singles competition.^[1] Fernando González was the defending singles champion of the tennis tournament, held in Auckland, New Zealand.

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

	First round							Second round							Quarterfinals							Semifinals							Final
	1	F González	6	6
	LL	L Horna	3	4				1	F González	6	6
	Q	I Minář	2					Q	I Minář	1	4
		W Moodie	1r												1	F González	0	3
		K Carlsen	5	2											5	M Ančić	6	6
		A Murray	7	6					A Murray	3	64
	WC	M Nielsen	1	2				5	M Ančić	6	77
	5	M Ančić	6	6																		5	M Ančić	6	6
	3	R Ginepri	61	6	2																		S Wawrinka	3	1
		A Martín	77	3	6				A Martín	2	2
		T Zíb	3	4					S Wawrinka	6	6
		S Wawrinka	6	6												S Wawrinka	6	6
	WC	D King-Turner	2	2												F Mayer	3	4
		F Mayer	6	6					F Mayer	6	6
		R Vik	78	6					R Vik	2	2
	8	F López	66	1																									5	Mario Ančić	2	2
	7	J Nieminen	6	6																									7	Jarkko Nieminen	6	6
		M Baghdatis	2	2				7	J Nieminen	6	6
		F Volandri	0	1r					P Goldstein	4	3
		P Goldstein	6	3											7	J Nieminen	6	77
		C Rochus	6	6												N Massú	3	64
		J Acasuso	4	4					C Rochus	4	2
		N Massú	6	6					N Massú	6	6
	4	D Hrbatý	2	4																		7	J Nieminen	6	64	77
	6	O Rochus	6	6																		6	O Rochus	4	77	64
		Montañés	2	4				6	O Rochus	6	7
	Q	J Hernych	6	6				Q	J Hernych	1	5
		A Pavel	1	2											6	O Rochus	6	6
	Q	R Sluiter	6	6											2	D Ferrer	2	0
		D Bracciali	3	4				Q	R Sluiter	4	3
	Q	F Luzzi	5	2				2	D Ferrer	6	6
	2	D Ferrer	7	6

• Singles draw
• Qualifying Singles draw