Defending champion Roger Federer defeated Richard Gasquet in the final, 6–3, 7–5, 7–6(7–4) to win the singles tennis title at the 2005 Hamburg European Open. He did not lose a single set in the entire tournament.

Seeds

A champion seed is indicated in bold text while text in italics indicates the round in which that seed was eliminated.

Draw

Finals

Top half

Section 1

Section 2

Bottom half

Section 3

Section 4

Qualifying

Qualifying seeds

• # 🇪🇸 Juan Carlos Ferrero (qualified) • # 🇦🇷 Mariano Puerta (qualified) • # 🇫🇷 Richard Gasquet (qualified) • # 🇺🇸 Kevin Kim (first round) • # 🇧🇪 Christophe Rochus (qualified) • # 🇫🇷 Paul-Henri Mathieu (qualifying competition, lucky loser) • # 🇦🇷 Juan Mónaco (qualifying competition, lucky loser) • # 🇪🇸 Santiago Ventura (qualified) • # 🇺🇸 Robby Ginepri (first round) • # 🇪🇸 Guillermo García López (qualifying competition) • # 🇮🇹 Davide Sanguinetti (qualifying competition) • # 🇪🇸 Félix Mantilla (first round) • # 🇪🇸 Álex Calatrava (qualifying competition) • # (n/a) • # 🇪🇸 Óscar Hernández (qualifying competition) • # 🇩🇪 Tomas Behrend (qualifying competition)

Qualifiers

• # 🇪🇸 Juan Carlos Ferrero • # 🇦🇷 Mariano Puerta • # 🇫🇷 Richard Gasquet • # 🇮🇹 Andreas Seppi • # 🇧🇪 Christophe Rochus • # 🇪🇸 Nicolás Almagro • # 🇪🇸 David Sánchez • # 🇪🇸 Santiago Ventura

Lucky losers

• # 🇫🇷 Paul-Henri Mathieu (replaces Carlos Moyá) • # 🇦🇷 Juan Mónaco (replaces Rafael Nadal)

Qualifying draw

First qualifier

Second qualifier

Third qualifier

Fourth qualifier

Fifth qualifier

Sixth qualifier

Seventh qualifier

Eighth qualifier