Singles
2023 Estoril Open
Final
Champion	Casper Ruud
Runner-up	Miomir Kecmanović
Score	6–2, 7–6(7–3)
Details
Draw	28 (4 Q / 3 WC )
Seeds	8
Events
Singles Doubles
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Casper Ruud defeated Miomir Kecmanović in the final, 6–2, 7–6^(7–3) to win the singles tennis title at the 2023 Estoril Open. The victory marked Ruud's tenth career singles title and his first of the season. Kecmanović was bidding to secure his second career singles title.^[1]

Sebastián Báez was the defending champion,^[2] but lost in the quarterfinals to Ruud.^[3]

The top four seeds received a bye into the second round.

	Semifinals							Final
	1	Casper Ruud	6	3	77
		Quentin Halys	4	6	62
								1	Casper Ruud	6	77
								6	Miomir Kecmanović	2	63
		Marco Cecchinato	3	1
	6	Miomir Kecmanović	6	6

	First round							Second round							Quarterfinals							Semifinals
								1	C Ruud	4	6	6
		G Zeppieri	4	6	3			WC	J Sousa	6	2	2
	WC	J Sousa	6	1	6										1	C Ruud	6	6
		P Cachin	6	6											5	S Báez	3	0
		C-h Tseng	4	4					P Cachin	4	62
		R Albot	5	63				5	S Báez	6	77
	5	S Báez	7	77																		1	C Ruud	6	3	77
																							Q Halys	4	6	62
								4/WC	R Bautista Agut	65	5
		N Borges	3	4					Q Halys	77	7
		Q Halys	6	6												Q Halys	6	6
		D Thiem	3	6	6											D Thiem	1	4
	Q	S Ofner	6	3	4				D Thiem	6	6
		C Lestienne	5	5				8/WC	B Shelton	2	2
	8/WC	B Shelton	7	7

	First round							Second round							Quarterfinals							Semifinals
	7	D Schwartzman	3	68
		M Cecchinato	6	710					M Cecchinato	4	6	6
	Q	A Giannessi	2	1					F Fognini	6	3	3
		F Fognini	6	6												M Cecchinato	7	77
		L Van Assche	65	6	6										3	A Davidovich Fokina	5	65
	Q	P Sousa	77	3	1				L Van Assche	3	5
								3	A Davidovich Fokina	6	7
																							M Cecchinato	3	1
	6	M Kecmanović	6	6																		6	M Kecmanović	6	6
		L Nardi	4	1				6	M Kecmanović	6	6
		J Rodionov	3	6	6				J Rodionov	0	1
		A Ramos Viñolas	6	1	4										6	M Kecmanović	7	6
		B Zapata Miralles	6	6												B Zapata Miralles	5	2
	Q	H Rocha	4	2					B Zapata Miralles	67	6	6
								2	H Hurkacz	79	4	2

	First round							Qualifying competition
	1	Fábián Marozsán	6	6
		Manuel Guinard	3	0
								1	Fábián Marozsán	6	65	4
									Alessandro Giannessi	4	77	6
		Alessandro Giannessi	1	7	6
	6	Oleksii Krutykh	6	5	1

	First round							Qualifying competition
	2	Sebastian Ofner	6	6
		Robin Haase	3	4
								2	Sebastian Ofner	66	77	6
									Frederico Ferreira Silva	78	65	3
		Frederico Ferreira Silva	6	5	6
	8	Damir Džumhur	1	7	3

	First round							Qualifying competition
	3	Ryan Peniston	4	1
	WC	Henrique Rocha	6	6
								WC	Henrique Rocha	6	6
									Máté Valkusz	4	2
		Máté Valkusz	6	6
	7	Dalibor Svrčina	0	2

	First round							Qualifying competition
	4	Jozef Kovalík	6	5	3
	WC	Pedro Sousa	4	7	6
								WC	Pedro Sousa	6	6
								5	Timofey Skatov	4	4
		Adrian Andreev	1	1r
	5	Timofey Skatov	6	3

• Main draw
• Qualifying draw