2024 Open de Oeiras – Singles

Facundo Díaz Acosta was the defending champion but chose not to defend his title.

Francisco Comesaña won the title after defeating Ugo Blanchet 6–4, 3–6, 7–5 in the final.

Seeds
• # 🇮🇹 Fabio Fognini (second round)

• # 🇧🇷 Thiago Monteiro (first round)

• # 🇭🇺 Zsombor Piros (withdrew)

• # 🇦🇷 Francisco Comesaña (champion)

• # 🇺🇸 Emilio Nava (second round)

• # 🇫🇷 Térence Atmane (second round)

• # 🇺🇸 Nicolas Moreno de Alboran (first round)

• # 🇦🇷 Juan Manuel Cerúndolo (first round)

• # Jesper de Jong (second round)