Singles
1989 Mercedes Cup
Final
Champion	Martín Jaite
Runner-up	Goran Prpić
Score	6–3, 6–2
Details
Draw	48 (4WC/6Q)
Seeds	16
Events
Singles Doubles
← 1988 · Stuttgart Open · 1990 →

Andre Agassi was the defending champion, but did not compete this year.

Martín Jaite won the title by defeating Goran Prpić 6–3, 6–2 in the final.^[1]

All seeds received a bye into the second round.

	Quarterfinals							Semifinals							Final
	WC	Jens Wöhrmann	6	6
	7	Guillermo Pérez Roldán	3	3
								WC	Jens Wöhrmann	7	4	3
								14	Martín Jaite	5	6	6
	14	Martín Jaite	3	7	6
	12	Jordi Arrese	6	5	4
															14	Martín Jaite	6	6
																Goran Prpić	3	2
		Goran Prpić	7	6	6
		Alex Antonitsch	6	7	3
									Goran Prpić	3	7	6
								8	Sergi Bruguera	6	5	1
	8	Sergi Bruguera	6	6
		Martin Wostenholme	1	4

	First round							Second round							Third round							Quarterfinals
								1	J Hlasek	4	6	3
	WC	J Wöhrmann	6	4	7			WC	J Wöhrmann	6	4	6
		B Orešar	2	6	6										WC	J Wöhrmann	6	6
	Q	M Ostoja	4	3											16	J Gunnarsson	4	4
		F Cancellotti	6	6					F Cancellotti	1	6	3
								16	J Gunnarsson	6	3	6
																						WC	J Wöhrmann	6	6
																						7	G Pérez Roldán	3	3
								10	A Gómez	6	6	6
	Q	M Zillner	6	3				Q	F Santoro	7	2	7
	Q	F Santoro	7	6											Q	F Santoro	1	6	3
		S Colombo	1	7	6										7	G Pérez Roldán	6	3	6
		O Delaître	6	6	1				S Colombo	1	6
								7	G Pérez Roldán	6	7

	First round							Second round							Third round							Quarterfinals
								3	A Krickstein	6	6
	Q	S Doseděl	0	7	2			Q	L Koslowski	2	3
	Q	L Koslowski	6	5	6										3	A Krickstein	1	6	2
		L Duncan	0	6	3										14	M Jaite	6	4	6
	Q	P Korda	6	0	6			Q	P Korda	3	1
								14	M Jaite	6	6
																						14	M Jaite	3	7	6
																						12	J Arrese	6	5	4
								12	J Arrese	6	6
		T Tulasne	7	7					T Tulasne	0	4
	WC	T Šmíd	6	6											12	J Arrese	6	6
		M Davis	6	6	1										6	M Pernfors	4	3
		A Cherkasov	1	7	6				A Cherkasov	5	2
								6	M Pernfors	7	6

	First round							Second round							Third round							Quarterfinals
								5	M Mečíř	0	3
		C Motta	3	2					G Prpić	6	6
		G Prpić	6	6												G Prpić	1	6	6
		M Stich	7	6											11	R Agénor	6	4	1
		F Luna	5	2					M Stich	6	1	4
								11	R Agénor	4	6	6
																							G Prpić	7	6	6
																							A Antonitsch	6	7	3
								13	D Cahill	4	1
		S Matsuoka	6	6	1				A Antonitsch	6	6
		A Antonitsch	7	3	6											A Antonitsch	5	6	6
		B Drewett	3	2											4	K Curren	7	4	0
		H de la Peña	6	6					H de la Peña	3	4
								4	K Curren	6	6

	First round							Second round							Third round							Quarterfinals
								8	S Bruguera	6	6
	WC	M Sinner	6	7				WC	M Sinner	3	4
		É Winogradsky	4	5											8	S Bruguera	6	4	6
		M Vajda	3	6	6											M Vajda	2	6	1
	WC	M Tideman	6	1	2				M Vajda	6	6
								9	J Fitzgerald	0	4
																						8	S Bruguera	6	6
																							M Wostenholme	1	4
								15	A Volkov	4	5
		M Wostenholme	6	7					M Wostenholme	6	7
		E Bengoechea	3	6												M Wostenholme	6	6
		M Střelba	6	6											2	A Mancini	2	2
		M Filippini	7	7					M Filippini	3	6
								2	A Mancini	6	7

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