2005 Stuttgart Open – Singles

Rafael Nadal defeated Gastón Gaudio in the final, 6–3, 6–3, 6–4 to win the singles tennis title at the 2005 Stuttgart Open.

Guillermo Cañas was the reigning champion, but did not participate this year.

Seeds
• # 🇪🇸 Rafael Nadal (champion)

• # 🇷🇺 Nikolay Davydenko (semifinals, retired due to sickness)

• # 🇦🇷 Gastón Gaudio (final)

• # 🇪🇸 Tommy Robredo (third round)

• # 🇪🇸 David Ferrer (second round)

• # 🇨🇿 Jiří Novák (third round)

• # 🇷🇺 Mikhail Youzhny (second round)

• # 🇮🇹 Filippo Volandri (second round)

• # 🇧🇪 Olivier Rochus (second round)

• # 🇦🇹 Jürgen Melzer (second round)

• # 🇨🇿 Tomáš Berdych (quarterfinals)

• # Andrei Pavel (second round)

• # 🇦🇷 José Acasuso (second round)

• # 🇷🇺 Igor Andreev (second round)

• # 🇪🇸 Alberto Martín (second round)

• # 🇫🇷 Paul-Henri Mathieu (third round)

Key

 * Q - Qualifier
 * WC - Wild Card
 * r - Retired
 * LL - Lucky loser
 * w/o - Walkover