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Singles
1990 Norstar Bank Hamlet Challenge Cup
Final
Champion	Stefan Edberg
Runner-up	Goran Ivanišević
Score	7–6(7–3), 6–3
Details
Draw	28
Seeds	8
Events
Singles Doubles
← 1989 · Norstar Bank Hamlet Challenge Cup · 1991 →

Ivan Lendl was the defending champion (the previous year was an exhibition), but chose not to participate that year.

Stefan Edberg won in the final 7–6^(7–3), 6–3, against Goran Ivanišević.^[1]

The top four seeds receive a bye into the second round.

	Semifinals							Final
	1	Stefan Edberg	6	6
	6/WC	John McEnroe	1	4
								1	Stefan Edberg	77	6
								5	Goran Ivanišević	63	3
	5	Goran Ivanišević	6	1	6
	8	Guy Forget	2	6	3

	First round							Second round							Quarterfinals							Semifinals
								1	S Edberg	3	6	6
	WC	D Wheaton	6	3	6			WC	D Wheaton	6	1	2
		J Arias	3	6	1										1	S Edberg	6	6
		A Antonitsch	4	3											7	J Svensson	4	2
	WC	Y Noah	6	6				WC	Y Noah	4	4
		O Delaître	3	4				7	J Svensson	6	6
	7	J Svensson	6	6																		1	S Edberg	6	6
																						6/WC	J McEnroe	1	4
								3	B Gilbert	2	6	7
		U Riglewski	2	6	0				C-U Steeb	6	1	5
		C-U Steeb	6	4	6										3	B Gilbert	3	2
		S Bruguera	6	1	3										6/WC	J McEnroe	6	6
		M Stich	3	6	6				M Stich	3	5
	Q	N Borwick	4	1				6/WC	J McEnroe	6	7
	6/WC	J McEnroe	6	6

	First round							Second round							Quarterfinals							Semifinals
	5	G Ivanišević	6	6
	Q	G Pozzi	3	1				5	G Ivanišević	6	2	6
	Q	W Ferreira	6	6				Q	W Ferreira	2	6	3
		R Agénor	4	3											5	G Ivanišević	77	6
	Q	F Montana	6	6	6										4	P Sampras	65	3
		J-P Fleurian	7	2	3			Q	F Montana	4	6
								4	P Sampras	6	7
																						5	G Ivanišević	6	1	6
	8	G Forget	7	7																		8	G Forget	2	6	3
		G Muller	6	6				8	G Forget	6	6
		G Bloom	1	2					P Haarhuis	3	3
		P Haarhuis	6	6											8	G Forget	64	6	7
		B Shelton	6	6	1										2	A Gómez	77	0	5
		E Jelen	7	0	6				E Jelen	4	6	3
								2	A Gómez	6	3	6

• ITF tournament draw