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Singles
1989 Cincinnati Open
Final
Champion	Brad Gilbert
Runner-up	Stefan Edberg
Score	6–4, 2–6, 7–6
Details
Draw	64
Seeds	16
Events
Singles Doubles
← 1988 · Cincinnati Open · 1990 →

Mats Wilander was the defending champion but lost in the semifinals to Stefan Edberg.

Brad Gilbert won in the final 6–4, 2–6, 7–6 against Edberg.

	Semifinals							Final
	1	Boris Becker	6	3	4
	5	Brad Gilbert	3	6	6
								5	Brad Gilbert	6	2	7
								2	Stefan Edberg	4	6	6
	3	Mats Wilander	6	6
	2	Stefan Edberg	7	7

	First round							Second round							Third round							Quarterfinals
	1	B Becker	6	7
		R Leach	3	6				1	B Becker	6	6
	Q	P McEnroe	6	6				Q	P McEnroe	4	1
	Q	M Knowles	1	0											1	B Becker	6	6
	Q	M Ruah	2	1												V Amritraj	1	1
		V Amritraj	6	6					V Amritraj	6	7
		O Delaître	7	6					O Delaître	3	6
	15	A Volkov	6	1																		1	B Becker	6	6
	9	A Järryd	3	6	3																	8	J Yzaga	1	2
		M Davis	6	4	6				M Davis	6	2	6
		O Rahnasto	1r						J Brown	3	6	4
		J Brown	4													M Davis	4	6	6
		R Van't Hof	3	6	2										8	J Yzaga	6	2	7
		D Visser	6	3	6				D Visser	4	2
		N Marques	3	3				8	J Yzaga	6	6
	8	J Yzaga	6	6

	First round							Second round							Third round							Quarterfinals
	4	M Chang	6	6
		N Broad	1	1				4	M Chang	6	5	7
		J Grabb	6	6					J Grabb	3	7	6
		J Frawley	1	3											4	M Chang	6	6
		M Kratzmann	1	2											14	J Courier	3	3
		R Seguso	6	6					R Seguso	6	1	4
		T Wilkison	2	4				14	J Courier	3	6	6
	14	J Courier	6	6																		4	M Chang	6	6	3
	11	J Fitzgerald	4	4																		5	B Gilbert	3	7	6
		P Sampras	6	6					P Sampras	7	2	6
		M Nido	6	0	4				A Olhovskiy	5	6	3
		A Olhovskiy	1	6	6											P Sampras	7	3	4
	WC	J Ross	3	0											5	B Gilbert	6	6	6
		J Stoltenberg	6	6					J Stoltenberg	3	2
	Q	A Moreno	3	4				5	B Gilbert	6	6
	5	B Gilbert	6	6

	First round							Second round							Third round							Quarterfinals
	6	A Krickstein	6	6	6
		A Cherkasov	7	4	1			6	A Krickstein	6	7
		C Bailey	6	7					C Bailey	3	5
	LL	M Petchey	2	6											6	A Krickstein	6	4	5
		T Tulasne	3	1											12	A Gómez	3	6	7
		D Pate	6	6					D Pate	4	3
		W Masur	4	4				12	A Gómez	6	6
	12	A Gómez	6	6																		12	A Gómez	0	6
	13	P Lundgren	5	2																		3	M Wilander	6	7
		N Kroon	7	6					N Kroon	6	6
		P Aldrich	6	6					P Aldrich	3	3
	Q	M Rincon	1	2												N Kroon	3	2
		J Rive	4	6	6										3	M Wilander	6	6
		R Matuszewski	6	4	2				J Rive	4	4
	Q	B Talbot	3	2				3	M Wilander	6	6
	3	M Wilander	6	6

	First round							Second round							Third round							Quarterfinals
	7	A Chesnokov	6	7
	Q	S Salumaa	0	5				7	A Chesnokov	3	4
		M Schapers	4	6	3				G Muller	6	6
		G Muller	6	2	6											G Muller	4	2
		É Winogradsky	3	6	3										10	J Svensson	6	6
	Q	F Hunt	6	1	6			Q	F Hunt
		M Anger	1	3				10	J Svensson	w/o
	10	J Svensson	6	6																		10	J Svensson	4	6
	16	D Rostagno	6	5	3																	2	S Edberg	6	7
		J Frana	3	7	6				J Frana	6	6	2r
		R Krishnan	1	6	7				R Krishnan	4	7	4
	WC	B Scanlon	6	3	6											R Krishnan	4	6	4
	WC	B Pearce	3	6	7										2	S Edberg	6	3	6
	WC	M Robertson	6	4	5			WC	B Pearce	4	1
		B Moir	4	3				2	S Edberg	6	6
	2	S Edberg	6	6

• 1989 Cincinnati Open Draw