Singles
1998 Copenhagen Open
Final
Champion	Magnus Gustafsson[1]
Runner-up	David Prinosil
Score	3–6, 6–1, 6–1
Details
Draw	32
Seeds	8
Events
Singles Doubles
← 1997 · Copenhagen Open · 1999 →

The 1998 Copenhagen Open was a men's tennis tournament played on indoor carpet courts in Copenhagen, Denmark that was part of the International Series of the 1998 ATP Tour. It was the eleventh edition of the tournament and was held from 9 March through 15 March 1998.

Champion seeds are indicated in bold text while text in italics indicates the round in which those seeds were eliminated.

	Semifinals							Final[1]
		David Prinosil	6	7
	4	Jan Siemerink	3	65
									David Prinosil	6	1	1
								2	Magnus Gustafsson	3	6	6
		Kenneth Carlsen	4	7	2
	2	Magnus Gustafsson	6	5	6

	First round							Second round							Quarterfinals							Semifinals
	1	T Johansson	6	6
		D van Scheppingen	2	2				1	T Johansson	6	4	6
		D Prinosil	7	6					D Prinosil	3	6	4
		C Vinck	5	3												D Prinosil	6	6
		O Delaître	7	4	6											O Delaître	3	3
		F Fetterlein	66	6	3				O Delaître	0	6	6
		M Sinner	4	7	6				M Sinner	6	0	2
	8	M Damm	6	65	4																		D Prinosil	6	7
	4	J Siemerink	6	6																		4	J Siemerink	3	65
		A Clément	1	3				4	J Siemerink	6	4	6
		D Nargiso	7	6					D Nargiso	4	6	3
		M Tillström	5	4											4	J Siemerink	6	6
		D Sanguinetti	7	7											6	B Steven	3	3
		J Van Herck	64	5					D Sanguinetti	3	1
	6	B Steven	6	6				6	B Steven	6	6
		J Knippschild	4	0

	First round							Second round							Quarterfinals							Semifinals
	5	F Dewulf	6	6
		N Kulti	4	4				5	F Dewulf	4	64
		K Carlsen	6	6					K Carlsen	6	7
		J Díaz	1	1												K Carlsen	6	3	6
		G Pozzi	6	6												G Pozzi	3	6	1
		A Boetsch	4	3					G Pozzi	7	6
	3	H Arazi	6	6				3	H Arazi	5	2
		R Vašek	3	3																			K Carlsen	4	7	2
		A Pavel	3	6	7																	2	M Gustafsson	6	5	6
	7	M-K Goellner	6	3	64				A Pavel	64	6	6
		T Ketola	7	2	6				T Ketola	7	2	1
		R Schüttler	5	6	3											A Pavel	3	6	3
		R Furlan	6	3	6										2	M Gustafsson	6	4	6
		J Printzlau	3	6	3				R Furlan	2	2
	2	M Gustafsson	6	7				2	M Gustafsson	6	6
		J Krošlák	1	62

• Main draw