2006 Estoril Open – Men's singles

In the men's singles final, David Nalbandian defeated Nikolay Davydenko with a score of 6–3, 6–4.

Seeds
• # 🇦🇷 David Nalbandian (champion)

• # 🇷🇺 Nikolay Davydenko (finalist)

• # 🇪🇸 Tommy Robredo (withdrew due to abdominal injury)

• # 🇫🇷 Gaël Monfils (second round)

• # 🇷🇺 Dmitry Tursunov (second round)

• # 🇪🇸 Carlos Moyà (semifinals)

• # Nicolás Massú (second round)

• # 🇧🇪 Christophe Rochus (first round)