Singles
1990 KAL Cup Korea Open
Final
Champion	Alex Antonitsch
Runner-up	Pat Cash
Score	7–6, 6–3
Details
Draw	32
Seeds	8
Events
Singles Doubles
← 1989 · KAL Cup Korea Open · 1991 →

Robert Van't Hof was the defending champion, but did not participate this year.

Alex Antonitsch won the tournament, beating Pat Cash in the final, 7–6, 6–3.^[1]

	Semifinals							Final
	8	Gilad Bloom	3	3
	Q	Pat Cash	6	6
								Q	Pat Cash	6	3
									Alex Antonitsch	7	6
	6	Dan Goldie	6	3	6
		Alex Antonitsch	4	6	7

	First round							Second round							Quarterfinals							Semifinals
	1	W Masur	6	6
		C Saceanu	2	2				1	W Masur	7	6	4
		R Matuszewski	6	6	6				R Matuszewski	6	7	6
		J Stoltenberg	2	7	2											R Matuszewski	2	2
		M Nido	6	1											8	G Bloom	6	6
		S Živojinović	0	0r					M Nido	4	3
		S Youl	3	1				8	G Bloom	6	6
	8	G Bloom	6	6																		8	G Bloom	3	3
	3	P Chamberlin	5	2																		Q	P Cash	6	6
		G Connell	7	6					G Connell	7	5	2
		M Laurendeau	4	3				Q	P Cash	6	7	6
	Q	P Cash	6	6											Q	P Cash	6	6
	Q	N Brown	4	3											5	M Šrejber	2	3
	Q	J Carlsson	6	6				Q	J Carlsson	0	4
		T Nijssen	3	1				5	M Šrejber	6	6
	5	M Šrejber	6	6

	First round							Second round							Quarterfinals							Semifinals
	6	D Goldie	6	2	6
		T Woodbridge	4	6	4			6	D Goldie	4	6	6
	WC	J-s Kim	5	4					J Rive	6	3	4
		J Rive	7	6											6	D Goldie	7	6
		N Pereira	1	3											Q	S Matsuoka	5	2
	Q	S Matsuoka	6	6				Q	S Matsuoka	6	6
	WC	J-h Lee	3	1				4	K Evernden	3	1
	4	K Evernden	6	6																		6	D Goldie	6	3	6
	7	T Högstedt	5	6	4																		A Antonitsch	4	6	7
		L Shiras	7	4	6				L Shiras	1	0
		A Antonitsch	6	6					A Antonitsch	6	6
		K Jones	4	4												A Antonitsch	6	6
	WC	B-S Kim	5	6	6											P Kühnen	4	4
		P Kühnen	7	2	7				P Kühnen	6	6
		L-A Wahlgren	6	7					L-A Wahlgren	0	1
	2	A Mansdorf	4	5

• Main draw