2025 Open de Oeiras

Country	Player	Rank1	Seed
ARG	Francisco Comesaña	61	1
	Roman Safiullin	68	2
BEL	Raphaël Collignon	91	3
BRA	Thiago Monteiro	94	4
USA	Nishesh Basavareddy	108	5
SRB	Dušan Lajović	109	6
BRA	Thiago Seyboth Wild	111	7
FRA	Valentin Royer	116	8

• ¹ Rankings are as of 7 April 2025.^[1]

The following players received wildcards into the singles main draw:

• Pedro Araújo
• Gastão Elias
• Tiago Pereira

The following players received entry into the singles main draw as alternates:

• Jan Choinski
• Matteo Gigante

The following players received entry from the qualifying draw:

• Rémy Bertola
• Juan Manuel Cerúndolo
• Guy den Ouden
• Stefano Travaglia
• Denis Yevseyev
• Bernabé Zapata Miralles

The following player received entry as a lucky loser:

• Alejandro Moro Cañas

• Elmer Møller def. Francisco Comesaña 6–0, 6–4.

• Karol Drzewiecki / Piotr Matuszewski def. Francisco Cabral / Lucas Miedler 6–4, 3–6, [10–8].