Singles
1990 Casablanca Open
Final
Champion	Thomas Muster
Runner-up	Guillermo Pérez Roldán
Score	6–1, 6–7(3–7), 6–2
Details
Draw	32
Seeds	8
Events
Singles Doubles
← 1989 · Casablanca Open · 1992 →

Tarik Benhabiles was the defending champion but lost in the second round to Thomas Muster.

Muster won in the final, 6–1, 6–7^(3–7), 6–2, against Guillermo Pérez Roldán.

	Semifinals							Final
	1	Guillermo Pérez Roldán	6	6
	6	Tomás Carbonell	1	1
								1	Guillermo Pérez Roldán	1	77	2
								2	Thomas Muster	6	63	6
	3	Goran Prpić	1	3
	2	Thomas Muster	6	6

	First round							Second round							Quarterfinals							Semifinals
	1	G Pérez Roldán	77	6
	Q	T Woodbridge	63	1				1	G Pérez Roldán	3	6	6
		R Fromberg	6	4	6				R Fromberg	6	3	3
	Q	M Larsson	2	6	2										1	G Pérez Roldán	6	7
		N Kulti	5	0												T Tulasne	2	5
		T Tulasne	7	6					T Tulasne	6	6
		S Youl	2	1				8	F Davín	3	2
	8	F Davín	6	6																		1	G Pérez Roldán	6	6
	4	M Střelba	1	0																		6	T Carbonell	1	1
		F Luna	6	6					F Luna	3	63
		L Jönsson	3	5					R Azar	6	77
		R Azar	6	7												R Azar	5	6	3
		M Wostenholme	6	6											6	T Carbonell	7	2	6
	WC	K Outaleb	4	4					M Wostenholme	1	4
		F Roig	4	2				6	T Carbonell	6	6
	6	T Carbonell	6	6

	First round							Second round							Quarterfinals							Semifinals
	5	P Haarhuis	6	2	3
	Q	N Utgren	1	6	6			Q	N Utgren	6	4	3
	WC	K Alami	4	5					J Anderson	0	6	6
		J Anderson	6	7												J Anderson	3	1
	Q	T Champion	6	6											3	G Prpić	6	6
		J Stoltenberg	3	2				Q	T Champion	5	66
	WC	Y El Aynaoui	2	67				3	G Prpić	7	78
	3	G Prpić	6	79																		3	G Prpić	1	3
	7	M Koevermans	6	6																		2	T Muster	6	6
		S Colombo	1	4				7	M Koevermans	6	1	6
		M Vajda	6	6					M Vajda	1	6	3
		J F Altur	3	2											7	M Koevermans	4	64
		T Benhabiles	6	6											2	T Muster	6	77
		L Lavalle	0	2					T Benhabiles	6	1	2
		A Võsand	2	5				2	T Muster	4	6	6
	2	T Muster	6	7

• 1990 Casablanca Open draw