Singles
1990 Czechoslovak Open
Final
Champion	Jordi Arrese
Runner-up	Nicklas Kulti
Score	7–6, 7–6
Details
Draw	32 (3WC/4Q)
Seeds	8
Events
Singles Doubles
← 1989 · Prague Open (1987–1999) · 1991 →

Marcelo Filippini was the defending champion, but lost in the second round to Nicklas Kulti.

Jordi Arrese won the title by defeating Kulti 7–6, 7–6 in the final.^[1][2]

	Semifinals							Final
		Horacio de la Peña	3	0r
		Nicklas Kulti	6	1
									Nicklas Kulti	6	6
								8	Jordi Arrese	7	7
	6	Goran Prpić	5	4
	8	Jordi Arrese	7	6

	First round							Second round							Quarterfinals							Semifinals
	1	T Muster	0r
		C Pistolesi	1						C Pistolesi	3	3
		T Benhabiles	6	3	6				T Benhabiles	6	6
		F Luna	4	6	4											T Benhabiles	2	6
	Q	S Pescosolido	6	6												H de la Peña	6	7
	Q	R Hanák	3	1				Q	S Pescosolido	3	1
		H de la Peña	6	6					H de la Peña	6	6
	7	M Larsson	0	2																			H de la Peña	3	0r
	4	M Filippini	7	6																			N Kulti	6	1
	Q	C Suk	6	1				4	M Filippini	1	3
		A Mronz	3	2					N Kulti	6	6
		N Kulti	6	6												N Kulti	6	1	6
		B Wuyts	2	6	6										5	F Davín	3	6	2
		R Azar	6	3	3				B Wuyts	3	2
		J Brown	3	6	3			5	F Davín	6	6
	5	F Davín	6	2	6

	First round							Second round							Quarterfinals							Semifinals
	6	G Prpić	4	6	6
		P Vojtíšek	6	3	1			6	G Prpić	7	6
		V Paloheimo	6	6					V Paloheimo	5	0
		M Střelba	0	2											6	G Prpić	2	6	7
		M Vajda	3	6	6										3	H Skoff	6	3	6
		F Clavet	6	4	2				M Vajda	4	1
		L Duncan	2	1				3	H Skoff	6	6
	3	H Skoff	6	6																		6	G Prpić	5	4
	8	J Arrese	6	6																		8	J Arrese	7	6
	WC	S Doseděl	4	4				8	J Arrese	2	6	6
		C Pioline	6	2				WC	J Kodeš Jr.	6	0	2
	WC	J Kodeš Jr.	7	6											8	J Arrese	w/o
		C Saceanu	6	6												C Saceanu
	WC	M Damm	4	3					C Saceanu	6	2	7
	Q	S Hiršzon	6					Q	S Hiršzon	2	6	6
	2	G Pérez Roldán	1	r

• Official results archive (ATP)
• Official results archive (ITF)