Men's singles
1990 Estoril Open
Final
Champion	Emilio Sánchez
Runner-up	Franco Davín
Score	6–3, 6–1
Details
Draw	32
Seeds	8
Events
Singles men women Doubles men women
Estoril Open · 1991 →

This was the first edition of the event.

Emilio Sánchez won in the final 6–3, 6–1, defeating Franco Davín.

	Semifinals							Final
		Jordi Arrese	2	1
	3	Emilio Sánchez	6	6
								3	Emilio Sánchez	6	6
									Franco Davín	3	1
		Juan Aguilera	4	3
		Franco Davín	6	6

	First round							Second round							Quarterfinals							Semifinals
	1 WC	J Berger	6	6
	WC	J Cunha Silva	1	3				1 WC	J Berger	7	77
		R Agénor	77	77					R Agénor	5	65
		J Sánchez	63	62											1 WC	J Berger	6	3	5
	Q	F Clavet	1	3												J Arrese	4	6	7
		J Arrese	6	6					J Arrese	6	6
		A Cherkasov	7	6					A Cherkasov	2	2
	7	G Pérez Roldán	5	3																			J Arrese	2	1
	3	E Sánchez	6	7																		3	E Sánchez	6	6
		R Fromberg	4	5				3	E Sánchez	6	6
		T Carbonell	6	77					T Carbonell	4	3
		J Fleurian	2	64											3	E Sánchez	6	6
		O Camporese	6	6												O Camporese	2	1
		U Riglewski	4	3					O Camporese	710	4	6
		K Nováček	6	3	6				K Nováček	68	6	1
	6	J Yzaga	3	6	2

	First round							Second round							Quarterfinals							Semifinals
	5	T Muster	4	6	7
		M Koevermans	6	3	5			5	T Muster	77	6
	Q	F Santoro	7	6				Q	F Santoro	63	2
	Q	M Vajda	5	4											5	T Muster	3	0
	WC	N Marques	4	3												J Aguilera	6	6
		P Canè	6	6					P Canè	2	77	4
		J Aguilera	4	77	6				J Aguilera	6	65	6
	4	A Gómez	6	62	1																		J Aguilera	4	3
	8	S Bruguera	6	6																			F Davín	6	6
		M Střelba	3	3				8	S Bruguera	5	4
	Q	M Ozer	1	4					F Davín	7	6
	Q	F Davín	6	6												F Davín	6	7
		J Potier	1	6	64											P Haarhuis	4	5
		G Prpić	6	1	77				G Prpić	1	2
		P Haarhuis	6	6					P Haarhuis	6	6
	2	M Jaite	0	3

• Main draw