2005 Estoril Open – Men's singles

In the men's singles final, Gastón Gaudio defeated Tommy Robredo with a score of 6–1, 2–6, 6–1.

Seeds
• # 🇪🇸 Carlos Moyà (semifinals, retired because of an arm injury)

• # 🇦🇷 Gastón Gaudio (champion)

• # 🇸🇪 Joachim Johansson (second round)

• # 🇪🇸 Tommy Robredo (finalist)

• # Nicolás Massú (first round)

• # 🇨🇿 Radek Štěpánek (withdrew due to harmstring injury)

• # 🇨🇿 Jiří Novák (first round)

• # 🇪🇸 Feliciano López (quarterfinals)