2004 Hamburg Masters – Doubles

Mark Knowles and Daniel Nestor were the defending champions, but lost in Quarterfinals to Wayne Black and Kevin Ullyett.

Black and Ullyett won the title, defeating Bob and Mike Bryan in the final 6–4, 6–2.

Seeds
All seeds received a bye into the second round. • # 🇺🇸 Bob Bryan / 🇺🇸 Mike Bryan (final)

• # 🇸🇪 Jonas Björkman / 🇦🇺 Todd Woodbridge (semifinals)

• # 🇮🇳 Mahesh Bhupathi / 🇧🇾 Max Mirnyi (second round)

• # Mark Knowles / 🇨🇦 Daniel Nestor (quarterfinals)

• # 🇦🇺 Wayne Arthurs / 🇦🇺 Paul Hanley (quarterfinals)

• # 🇨🇿 Martin Damm / 🇨🇿 Cyril Suk (second round)

• # Wayne Black /  Kevin Ullyett (champions)

• # 🇦🇷 Gastón Etlis / 🇦🇷 Martín Rodríguez (second round)