Singles
1989 Geneva Open
Champion	Marc Rosset
Runner-up	Guillermo Pérez Roldán
Score	6–4, 7–5
Draw	32
Seeds	8

Marián Vajda was the defending champion, but did not participate this year.

Marc Rosset won the title, defeating Guillermo Pérez Roldán 6–4, 7–5 in the final.

Seeds

Draw

Finals

	Semifinals							Final
	WC	Marc Rosset	6	3	6
		Eduardo Bengoechea	2	6	2
								WC	Marc Rosset	6	7
								4	Guillermo Pérez Roldán	4	5
	4	Guillermo Pérez Roldán	6	6
	Q	Francisco Yunis	4	3

Top half

	First round							Second round							Quarterfinals							Semifinals
	1	A Mancini	7	4	6
	Q	X Daufresne	5	6	7			Q	X Daufresne	6	6
		C Motta	6	6					C Motta	2	4
		A Võsand	3	4											Q	X Daufresne	1	2
		L Duncan	7	6											WC	M Rosset	6	6
		C Mezzadri	6	1					L Duncan	2	3
	WC	M Rosset	6	6				WC	M Rosset	6	6
	7/WC	G Forget	2	2																		WC	M Rosset	6	3	6
	3	A Gómez	6	6																			E Bengoechea	2	6	2
		A Mronz	1	1				3	A Gómez	6	6	5
		E Bengoechea	7	6					E Bengoechea	7	4	7
		F Luna	5	4												E Bengoechea	6	6
		J Brown	3	1												L Jönsson	3	2
		L Jönsson	6	6					L Jönsson	6	7
		S Lochbihler	3	1				6	M Filippini	3	5
	6	M Filippini	6	6

Bottom half

	First round							Second round							Quarterfinals							Semifinals
	5	G Ivanišević	3	6
		J Aguilera	6	7					J Aguilera	6	3	6
	WC	R Stadler	6	5	2				U Riglewski	1	6	4
		U Riglewski	4	7	6											J Aguilera	0	2
		H de la Peña	6	0	0										4	G Pérez Roldán	6	6
		R Argüello	2	6	6				R Argüello	6	2
		T Tulasne	5	3				4	G Pérez Roldán	7	6
	4	G Pérez Roldán	7	6																		4	G Pérez Roldán	6	6
	8	B Orešar	2	1																		Q	F Yunis	4	3
	Q	F Yunis	6	6				Q	F Yunis	7	6
		M Ostoja	6	0	7				M Ostoja	5	3
	Q	G Luza	3	6	6										Q	F Yunis	6	1	6
		M Wostenholme	0	6	5										Q	S Cortés	2	6	3
	Q	S Cortés	6	3	7			Q	S Cortés	5	6	6
		C Bergström	6	0	6				C Bergström	7	2	1
	2	S Bruguera	3	6	2

External links

• ATP main draw