Singles
2005 Grand Prix Hassan II
Final
Champion	Mariano Puerta
Runner-up	Juan Mónaco
Score	6–4, 6–1
Events
Singles Doubles
← 2004 · Grand Prix Hassan II · 2006 →

Santiago Ventura was the defending champion, but lost in the second round.

Mariano Puerta won the title, defeating Juan Mónaco 6–4, 6–1 in the final.

	Semifinals							Final
		Tomáš Zíb	2	4
		Juan Mónaco	6	6
									Juan Mónaco	4	1
								6	Mariano Puerta	6	6
	6	Mariano Puerta	6	78
	2	Filippo Volandri	3	66

	First round							Second round							Quarter-finals							Semi-finals
	1	R Schüttler	2	2
		T Zíb	6	6					T Zíb	6	6
		S Ventura	7	6					S Ventura	4	1
	WC	H Arazi	5	3												T Zíb	6	79
	Q	T Ascione	5	4											8	C Rochus	1	67
		D Sánchez	7	6					D Sánchez	5	6	3
	WC	M Tahiri	3	2				8	C Rochus	7	4	6
	8	C Rochus	6	6																			T Zíb	2	4
	4	F Santoro	4	6	3																		J Mónaco	6	6
		J Vaněk	6	3	6				J Vaněk	4	6	3
	Q	G Simon	6	3	6			Q	G Simon	6	3	6
		J Acasuso	3	6	3										Q	G Simon	6	2	5
		D Sanguinetti	65	4												J Mónaco	4	6	7
		J Mónaco	77	6					J Mónaco	77	6
		B Ulihrach	2	1				5	F Mayer	64	0
	5	F Mayer	6	6

	First round							Second round							Quarter-finals							Semi-finals
	6	M Puerta	6	6
		T Behrend	4	1				6	M Puerta	6	77
		N Almagro	6	6					N Almagro	3	62
		L Burgsmüller	2	2											6	M Puerta	4	6	6
	Q	M Gicquel	1	7	6											A Clément	6	1	2
	Q	M Mertiňák	6	5	4			Q	M Gicquel	4	4
		A Clément	7	6					A Clément	6	6
	3	L Horna	5	2																		6	M Puerta	6	78
	7	G Müller	7	6																		2	F Volandri	3	66
		J-R Lisnard	5	2				7	G Müller	6	6
		J Tipsarevic	7	6					J Tipsarevic	3	4
		O Mutis	5	3											7	G Müller	60	1
		J Nieminen	6	77											2	F Volandri	77	6
		V Hănescu	3	62					J Nieminen	6	1	4
	WC	Y El Aynaoui	3	65				2	F Volandri	3	6	6
	2	F Volandri	6	77

• 2005 Grand Prix Hassan II Draw
• 2005 Grand Prix Hassan II Qualifying Draw