Singles
1998 Grand Prix Hassan II
Final
Champion	Andrea Gaudenzi
Runner-up	Álex Calatrava
Score	6–4, 5–7, 6–4
Details
Draw	32
Seeds	8
Events
Singles Doubles
← 1997 · Grand Prix Hassan II · 1999 →

Hicham Arazi was the defending champion, but lost in the quarterfinals this year.

Andrea Gaudenzi won the title, defeating Álex Calatrava 6–4, 5–7, 6–4 in the final.

	Semifinals							Final
		Álex Calatrava	6	62	78
	3	Karim Alami	3	77	66
									Álex Calatrava	4	7	4
								4	Andrea Gaudenzi	6	5	6
	4	Andrea Gaudenzi	6	6
	Q	Sébastien Grosjean	4	4

	First round							Second round							Quarter-finals							Semi-finals
	1	A Portas	6	6
		G Schaller	1	4				1	A Portas	6	6
		R Schüttler	3	2				Q	A Sávolt	3	4
	Q	A Sávolt	6	6											1	A Portas	2	4
		F Squillari	3	3												Á Calatrava	6	6
		Á Calatrava	6	6					Á Calatrava	6	6
	WC	M Tahiri	5	1				8	D Sanguinetti	1	1
	8	D Sanguinetti	7	6																			Á Calatrava	6	62	78
	3	K Alami	6	6																		3	K Alami	3	77	66
		M Craca	3	2				3	K Alami	4	6	6
		M Martelli	4	4					C Ruud	6	4	4
		C Ruud	6	6											3	K Alami	3	77	7
		F Vicente	1	6	6											F Vicente	6	65	5
		J van Lottum	6	3	0				F Vicente	w/o
		Á López Morón	2	5				5	S Schalken
	5	S Schalken	6	7

	First round							Second round							Quarter-finals							Semi-finals
	6	J A Marín	4	6	6
		R Furlan	6	4	0			6	J A Marín	6	6
	Q	C Auffray	3	6	6			Q	C Auffray	4	2
		J Knippschild	6	3	0										6	J A Marín	77	5	2
	WC	A Boetsch	3	6	3										4	A Gaudenzi	64	7	6
	Q	A di Pasquale	6	4	6			Q	A di Pasquale	2	3
		A Pavel	77	5	3			4	A Gaudenzi	6	6
	4	A Gaudenzi	62	7	6																	4	A Gaudenzi	6	6
	7	J Burillo	6	6																		Q	S Grosjean	4	4
		A Martín	2	4				7	J Burillo	62	5
		M Sinner	64	3				Q	S Grosjean	77	7
	Q	S Grosjean	77	6											Q	S Grosjean	7	2	6
		J Díaz	6	6											2	H Arazi	5	6	3
	WC	M El Aarej	1	4					J Díaz	5	2
		H Gumy	3	6	1			2	H Arazi	7	6
	2	H Arazi	6	0	6

• Association of Tennis Professionals (ATP) – 1998 Grand Prix Hassan II Men's Singles draw