| Men's doubles | |
|---|---|
| 2003 Estoril Open | |
| Champions | |
| Runners-up | |
| Score | 6–1, 6–2 |
Karsten Braasch and Andrei Olhovskiy were the defending champions but did not compete that year.
Mahesh Bhupathi and Max Mirnyi won in the final 6–1, 6–2 against Lucas Arnold and Mariano Hood.
Mahesh Bhupathi / 
Max Mirnyi (champions)
Martin Damm / Cyril Suk (quarterfinals) Tomáš Cibulec / Pavel Vízner (first round)
Wayne Arthurs / 
Donald Johnson (first round)| First round | Quarterfinals | Semifinals | Final | ||||||||||||||||||||||||
| 1 | 4 | 6 | 77 | ||||||||||||||||||||||||
| 6 | 3 | 64 | 1 | 6 | 6 | ||||||||||||||||||||||
| 6 | 6 | 2 | 2 | ||||||||||||||||||||||||
| 4 | 4 | 1 | 6 | 6 | |||||||||||||||||||||||
| 3 | 6 | 3 | 2 | 3 | 2 | ||||||||||||||||||||||
| 4 | 6 | 6 | 6 | 6 | |||||||||||||||||||||||
| 4 | 1 | 2 | 2 | ||||||||||||||||||||||||
| 6 | 6 | 1 | 6 | 6 | |||||||||||||||||||||||
| WC | 6 | 6 | 1 | 2 | |||||||||||||||||||||||
| 3 | 3 | WC | 4 | 4 | |||||||||||||||||||||||
| 6 | 6 | 6 | 6 | ||||||||||||||||||||||||
| 4 | 4 | 4 | 61 | 77 | 4 | ||||||||||||||||||||||
| 1 | 1 | 77 | 65 | 6 | |||||||||||||||||||||||
| 6 | 6 | 77 | 6 | ||||||||||||||||||||||||
| WC | 3 | 4 | 2 | 63 | 3 | ||||||||||||||||||||||
| 2 | 6 | 6 | |||||||||||||||||||||||||
Eric Butorac and Jamie Murray were the defending champions. They were both present but did not compete together.
Butorac partnered with Todd Perry, but lost in the first round to Scott Lipsky and David Martin.
Murray partnered with Max Mirnyi, but lost in the first round to Thomas Johansson and Robert Lindstedt.
The 2004 Canada Masters doubles was an event of the one hundred and fifteenth edition of the Canada Masters; a WTA Tier I tournament and the most prestigious men's tennis tournament held in Canada. Mahesh Bhupathi and Max Mirnyi were the defending champions. They were both present but did not compete together. Mirnyi partnered with Jonas Björkman, but Bhupathi and partner Leander Paes defeated them 6–4, 6–2, in the final.
Bob Bryan and Mike Bryan were the defending champions but lost in the first round to Christophe Rochus and Olivier Rochus.
Daniel Nestor and Nenad Zimonjić were the defending champions, but lost in the semifinals to Mahesh Bhupathi and Mark Knowles.
Max Mirnyi and Andy Ram were the defending champions. Both were present, but chose not to compete together this year.
Ram partnered with Michaël Llodra, but they lost to Feliciano López and Fernando Verdasco in the first round.
Mirnyi partnered with Mahesh Bhupathi, reaching the final, where they were defeated by Lukáš Dlouhý and Leander Paes.
Lleyton Hewitt and Sandon Stolle were the defending champions but only Stolle competed that year with Max Mirnyi.
Nicklas Kulti and Max Mirnyi were the defending champions but only Mirnyi competed that year with Sandon Stolle.
Mahesh Bhupathi and Leander Paes were the defending champions but they competed with different partners that year, Bhupathi with Max Mirnyi and Paes with Michael Hill.
The 2003 Hamburg Masters doubles was a German tennis event.
Joshua Eagle and Sandon Stolle were the defending champions but did not compete that year.
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.
Daniel Nestor and Nenad Zimonjić were the defending champions, but they lost to František Čermák and Michal Mertiňák 7–5, 6–2 in the first round.
Bob Bryan and Mike Bryan won in the final against Mahesh Bhupathi and Max Mirnyi, 6–3, 6–4.
Mahesh Bhupathi and Max Mirnyi were the defending champions, but did not play together this year. Bhupathi partnered Jonas Björkman, losing in the final. Mirnyi partnered Marat Safin, withdrawing from the quarterfinals.
František Čermák and Michal Mertiňák were the defending champions, however they lost to Mahesh Bhupathi and Max Mirnyi in the quarterfinals.
British wildcard pair Andy and Jamie Murray won the title, defeating Bhupathi and Mirnyi 7–6(10–8), 5–7, [10–7] in the final.
Mahesh Bhupathi and Max Mirnyi were the defending champions, but decided not to participate together.
Mahesh Bhupathi and Leander Paes were the defending champions, but this year Bhupathi played with Rohan Bopanna and Paes, who also won the tournament in 2010, played with Radek Štěpánek.
Bhupathi and Bopanna were defeated in the semifinals by Max Mirnyi and Daniel Nestor, who were then defeated in the final by Paes and Štěpánek 3–6, 6–1, [10–8].
Mahesh Bhupathi and Leander Paes were the defending champions. They successfully defended their title, defeating Olivier Delaître and Max Mirnyi in the final 6–7, 6–3, 6–2.
Mahesh Bhupathi and Max Mirnyi were the defending champions, but played this tournament with different partners. Bhupathi teamed up with Todd Woodbridge while Mirnyi teamed up with Jonas Björkman. Both pairs were eliminated in semifinals.
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.
