2005 Idea Prokom Open – Singles

Rafael Nadal was the defending champion, but did not participate.

Gaël Monfils won the title, defeating Florian Mayer 7–6(8–6), 4–6, 7–5 in the final.

Seeds
• # 🇦🇷 Mariano Puerta (first round)

• # 🇦🇷 Gastón Gaudio (withdrew due to a shoulder injury)

• # 🇦🇷 Guillermo Coria (semifinals)

• # 🇪🇸 Carlos Moyá (second round)

• # 🇮🇹 Filippo Volandri (second round)

• # 🇦🇷 José Acasuso (quarterfinals)

• # 🇷🇺 Igor Andreev (quarterfinals)

• # 🇷🇴 Victor Hănescu (quarterfinals)