Singles
1991 Geneva Open
Champion	Thomas Muster
Runner-up	Horst Skoff
Score	6–2, 6–4
Draw	32
Seeds	8

Horst Skoff was the defending champion, but lost in the final this year.

Thomas Muster won the title, defeating Skoff 6–2, 6–4 in the final.

Seeds

Draw

Finals

	Semifinals							Final
		Thomas Muster	77	77
	WC	Andrei Medvedev	63	65
									Thomas Muster	6	6
								4	Horst Skoff	2	4
	4	Horst Skoff	710	6
		Jordi Arrese	68	2

Top half

	First round							Second round							Quarterfinals							Semifinals
	1	S Bruguera	6	6
		B Wuyts	3	2				1	S Bruguera	78	1	6
	WC	C Mezzadri	6	7				WC	C Mezzadri	66	6	1
	WC	T Tulasne	3	5											1	S Bruguera	6	4	4
		T Muster	6	7												T Muster	4	6	6
		M Vajda	3	5					T Muster	4	6	6
		M Filippini	61	3				7	G Pérez Roldán	6	1	2
	7	G Pérez Roldán	77	6																			T Muster	77	77
	3	G Prpić	4	6	6																	WC	A Medvedev	63	65
		G Bloom	6	4	4			3	G Prpić	79	0	5
		R Furlan	4	5				Q	C Miniussi	67	6	7
	Q	C Miniussi	6	7											Q	C Miniussi	4	7	5
		J Gunnarsson	3	3											WC	A Medvedev	6	5	7
		E Masso	6	6					E Masso	7	63	1
	WC	A Medvedev	6	6				WC	A Medvedev	5	77	6
	6	M Rosset	2	1

Bottom half

	First round							Second round							Quarterfinals							Semifinals
	5	A Mancini	6	77
		L Mattar	3	65				5	A Mancini	1	6	4
		H de la Peña	77	77					H de la Peña	6	3	6
		F Davín	65	64												H de la Peña	63	6	1
		P Baur	6	65	5										4	H Skoff	77	4	6
	Q	M Merz	3	77	7			Q	M Merz	2	0
		G López	2	0				4	H Skoff	6	6
	4	H Skoff	6	6																		4	H Skoff	710	6
	8	O Camporese	3	4																			J Arrese	68	2
	Q	C Arriens	6	6				Q	C Arriens	5	7	5
		J Oncins	6	7					J Oncins	7	5	7
	Q	J Gisbert-Schultze	4	5												J Oncins	6	4	5
		V Paloheimo	77	4	6											J Arrese	4	6	7
		R Agénor	65	6	4				V Paloheimo	2	6	5
		J Arrese	6	4	6				J Arrese	6	3	7
	2	A Cherkasov	4	6	1

External links

• ATP main draw