Singles
1990 Belgian Indoor Championships
Final
Champion	Boris Becker
Runner-up	Carl-Uwe Steeb
Score	7–5, 6–2, 6–2
Details
Draw	32
Seeds	8
Events
Singles Doubles
← 1989 · Belgian Indoor Championships · 1991 →

Henri Leconte was the champion of the event when it last took place, in 1988. He participated in 1990 but lost in the first round.
Boris Becker won the title, defeating Carl-Uwe Steeb 7–5, 6–2, 6–2, in the final.

	Semifinals							Final
	1	Boris Becker	6	7
	6	Magnus Gustafsson	4	6
								1	Boris Becker	7	6	6
								2	Carl-Uwe Steeb	5	2	2
		Miloslav Mečíř	2	3
	2	Carl-Uwe Steeb	6	6

	First round							Second round							Quarterfinals							Semifinals
	1	B Becker	77	6
		K Nováček	64	2				1	B Becker	3	6	77
	Q	A Boetsch	3	4					G Forget	6	3	64
		G Forget	6	6											1	B Becker	6	3
		J Aguilera	6	64	6											P Canè	4	2r
		M Střelba	2	77	3				J Aguilera	3	77	4
		O Camporese	3	3				7	P Canè	6	60	6
	7	P Canè	6	6																		1	B Becker	6	77
	4	J Hlasek	6	6																		6	M Gustafsson	4	64
		M Koevermans	4	1				4	J Hlasek	7	2	69
		A Volkov	4	63					J Svensson	5	6	711
		J Svensson	6	77												J Svensson	77	63	3
	Q	T Nelson	3	6	4										6	M Gustafsson	63	77	6
		A Mansdorf	6	3	6				A Mansdorf	4	4
		J Gunnarsson	2	2				6	M Gustafsson	6	6
	6	M Gustafsson	6	6

	First round							Second round							Quarterfinals							Semifinals
	5	R Agénor	6	6
		M Schapers	4	4				5	R Agénor	6	6
	WC	X Daufresne	6	2	1			WC	B Wuyts	4	4
	WC	B Wuyts	4	6	6										5	R Agénor	3	2
		A Cherkasov	6	61	2											M Mečíř	6	6
	Q	A Rahunen	4	77	6			Q	A Rahunen	63	4
		M Mečíř	6	3	6				M Mečíř	77	6
	3	E Sánchez	4	6	4																		M Mečíř	2	3
	8	G Ivanišević	6	2	6																	2	C-U Steeb	6	6
		J Wöhrmann	4	6	3			8	G Ivanišević	6	62	6
		G Prpić	6	5	6				G Prpić	3	77	2
	WC	H Leconte	3	7	1										8	G Ivanišević	3	6	4
	Q	T Högstedt	6	6											2	C-U Steeb	6	3	6
		M Rosset	4	2				Q	T Högstedt	61	6	2
		E Jelen	3	62				2	C-U Steeb	77	4	6
	2	C-U Steeb	6	77

General