2024 Oeiras Indoors – Singles

Arthur Fils was the defending champion but chose not to defend his title.

Maks Kaśnikowski won the title after defeating Gastão Elias 7–6(7–1), 4–6, 6–3 in the final.

Seeds
• # Henrique Rocha (first round)

• # João Sousa (quarterfinals)

• # 🇹🇷 Cem İlkel (second round)

• # 🇫🇷 Maxime Janvier (first round, retired)

• # 🇧🇬 Adrian Andreev (first round)

• # 🇫🇷 Valentin Royer (semifinals)

• # 🇫🇷 Mathias Bourgue (second round)

• # 🇧🇪 Michael Geerts (first round)