| Doubles | |
|---|---|
| 2004 Hamburg Masters | |
| Champions |  Wayne Black Kevin Ullyett |
| Runners-up |  Bob Bryan Mike Bryan |
| Final score | 6–4, 6–2 |
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.
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)| Semifinals | Final | ||||||||||||
| 1 | Bob Bryan Mike Bryan | 77 | 6 | ||||||||||
| Leander Paes David Rikl | 64 | 3 | |||||||||||
| 1 | Bob Bryan Mike Bryan | 4 | 2 | ||||||||||
| 7 | Wayne Black Kevin Ullyett | 6 | 6 | ||||||||||
| 7 | Wayne Black Kevin Ullyett | 6 | 6 | ||||||||||
| 2 | Jonas Björkman Todd Woodbridge | 2 | 1 | ||||||||||
| First round | Second round | Quarterfinals | Semifinals | ||||||||||||||||||||||||
| 1 | B Bryan M Bryan | 6 | 6 | ||||||||||||||||||||||||
 J Erlich A Ram | 3 | 6 | 4 |  J Coetzee C Haggard | 0 | 3 | |||||||||||||||||||||
| J Coetzee C Haggard | 6 | 3 | 6 | 1 | B Bryan M Bryan | 6 | 6 | ||||||||||||||||||||
| WC |  M Kohlmann A Waske | 64 | 6 | 6 | WC | M Kohlmann A Waske | 3 | 2 | |||||||||||||||||||
| J Palmer P Vízner | 77 | 2 | 4 | WC | M Kohlmann A Waske | 6 | 1 | 7 | |||||||||||||||||||
| 6 | M Damm C Suk | 3 | 6 | 5 | |||||||||||||||||||||||
| 1 | B Bryan M Bryan | 77 | 6 | ||||||||||||||||||||||||
| L Paes D Rikl | 64 | 3 | |||||||||||||||||||||||||
| 3 | M Bhupathi M Mirnyi | 6 | 4 | 4 | |||||||||||||||||||||||
| L Paes D Rikl | 7 | 77 | L Paes D Rikl | 4 | 6 | 6 | |||||||||||||||||||||
 A Clément S Grosjean | 5 | 61 | L Paes D Rikl | 6 | 6 | ||||||||||||||||||||||
| M Hood S Prieto | 6 | 6 | 5 | W Arthurs P Hanley | 3 | 2 | |||||||||||||||||||||
 D Hrbatý  P Srichaphan | 2 | 2 | M Hood S Prieto | 3 | 6 | 63 | |||||||||||||||||||||
| 5 | W Arthurs P Hanley | 6 | 4 | 77 | |||||||||||||||||||||||
| First round | Second round | Quarterfinals | Semifinals | ||||||||||||||||||||||||
| 7 | W Black K Ullyett | 6 | 6 | ||||||||||||||||||||||||
 J Knowle  N Zimonjić | 4 | 6 | 6 | J Knowle N Zimonjić | 4 | 3 | |||||||||||||||||||||
| WC | K Braasch L Burgsmüller | 6 | 3 | 3 | 7 | W Black K Ullyett | 6 | 67 | 77 | ||||||||||||||||||
| N Kiefer R Schüttler | 4 | 6 | 7 | 4 | M Knowles D Nestor | 2 | 79 | 65 | |||||||||||||||||||
| J Novák P Pála | 6 | 0 | 5 | N Kiefer R Schüttler | 3 | 1 | |||||||||||||||||||||
| 4 | M Knowles D Nestor | 6 | 6 | ||||||||||||||||||||||||
| 7 | W Black K Ullyett | 6 | 6 | ||||||||||||||||||||||||
| 2 | J Björkman T Woodbridge | 2 | 1 | ||||||||||||||||||||||||
| 8 | G Etlis M Rodríguez | 1 | 2 | ||||||||||||||||||||||||
| G Cañas JI Chela | 6 | 77 | G Cañas JI Chela | 6 | 6 | ||||||||||||||||||||||
| F Čermák L Friedl | 4 | 61 | G Cañas JI Chela | 3 | 5 | ||||||||||||||||||||||
 N Massú  A Pavel | 6 | 3 | 6 | 2 | J Björkman T Woodbridge | 6 | 7 | ||||||||||||||||||||
L Arnold  S Sargsian | 3 | 6 | 2 | N Massú A Pavel | |||||||||||||||||||||||
| 2 | J Björkman T Woodbridge | w/o | |||||||||||||||||||||||||
Michaël Llodra and Fabrice Santoro were the defending champions, but they lost in quarterfinals 6–7(2), 5–7, against Jonas Björkman and Max Mirnyi.
Wayne Black and Kevin Ullyett were the defending champions, but Black retired in 2006, and only Ullyett competed that year.
Ullyett partnered with Paul Hanley, but Bob Bryan and Mike Bryan defeated them 6–3, 7–5, in the final.
Mahesh Bhupathi and Leander Paes were the defending champions. They were both present but did not compete together.
Bhupathi partnered with Martin Damm, but lost in the quarterfinals to Wayne Black and Kevin Ullyett.
Paes partnered with Nenad Zimonjić, but lost in the second round to Jonathan Erlich and Andy Ram.
Wayne Black and Kevin Ullyett were the defending champions but lost in the second round to Xavier Malisse and André Sá.
Jonas Björkman and Todd Woodbridge were the defending champions, but lost in the second round to Tomáš Cibulec and Daniel Vacek.
Wayne Ferreira and Yevgeny Kafelnikov were the defending champions but lost in the first round to Mark Knowles and Daniel Nestor.
Wayne Ferreira and Yevgeny Kafelnikov were the defending champions but lost in the second round to Wayne Black and Kevin Ullyett.
Mark Knowles and Daniel Nestor won in the final 6–3, 7–5, 6–0 against Mahesh Bhupathi and Max Mirnyi.
Mark Knowles and Daniel Nestor were the defending champions but lost in the quarterfinals to Roger Federer and Max Mirnyi.
Mark Knowles and Daniel Nestor were the defending champions but lost in the quarterfinals to Wayne Black and Kevin Ullyett.
Roger Federer and Max Mirnyi were the defending champions but only Mirnyi competed that year with Mahesh Bhupathi.
Bob Bryan and Mike Bryan were the defending champions, but lost in the semifinals this year.
Mark Knowles and Daniel Nestor were the defending champions.
Wayne Black and Kevin Ullyett were the defending champions, but lost in the final this year..
Mark Knowles and Daniel Nestor were the defending champions, but lost in the first round to Paul Goldstein and Jim Thomas.
Wayne Black and Kevin Ullyett were the defending champions, but lost in the quarterfinals to Mahesh Bhupati and Max Mirnyi.
Bob and Mike Bryan were the defending champions, but lost in second round to Jonathan Erlich and Andy Ram.
Wayne Black and Kevin Ullyett were the defending champions, but lost in second round to Mario Ančić and Ivan Ljubičić.
Mark Knowles and Daniel Nestor were the defending champions, but lost in semifinals to Jonas Björkman and Max Mirnyi.
Mahesh Bhupathi and Max Mirnyi defeated defending champions Wayne Arthurs and Paul Hanley 2–6, 6–3, 6–4 in the final. It was the 34th title for Bhupathi and the 20th title for Mirnyi in their respective careers.