| Doubles | |
|---|---|
| 2003 Qatar Open | |
| Champions | |
| Runners-up | |
| Score | 6–4, 7–6, [10–8] |
| Draw | 16 |
| Seeds | 4 |
Donald Johnson and Jared Palmer were the defending champions but did not compete that year.
Martin Damm and Cyril Suk won in the final 6–4, 7–6, [10–8] against Mark Knowles and Daniel Nestor.
Mark Knowles / 
Daniel Nestor (final)
Martin Damm / Cyril Suk (champions)
Yevgeny Kafelnikov / Radek Štěpánek (first round)
Julien Boutter / Fabrice Santoro (first round)| First round | Quarterfinals | Semifinals | Final | ||||||||||||||||||||||||
| 1 | 6 | 6 | |||||||||||||||||||||||||
| 3 | 3 | 1 | 6 | 3 | 77 | ||||||||||||||||||||||
| 6 | 63 | 4 | 0 | 6 | 62 | ||||||||||||||||||||||
| 2 | 77 | 6 | 1 | 77 | 6 | ||||||||||||||||||||||
| 3 | 4 | 1 | 64 | 3 | |||||||||||||||||||||||
| 6 | 6 | 6 | 6 | ||||||||||||||||||||||||
| 3 | 64 | 3 | 3 | ||||||||||||||||||||||||
| 6 | 77 | 1 | 4 | 68 | |||||||||||||||||||||||
| 77 | 3 | 6 | 2 | 6 | 710 | ||||||||||||||||||||||
| 65 | 6 | 3 | 6 | 6 | |||||||||||||||||||||||
| WC | 78 | 3 | 77 | WC | 1 | 3 | |||||||||||||||||||||
| 4 | 66 | 6 | 65 | 4 | 68 | ||||||||||||||||||||||
| 6 | 5 | 7 | 2 | 6 | 710 | ||||||||||||||||||||||
| 3 | 7 | 5 | 4 | 4 | |||||||||||||||||||||||
| WC | 0 | 1 | 2 | 6 | 6 | ||||||||||||||||||||||
| 2 | 6 | 6 | |||||||||||||||||||||||||
Jonas Björkman and Todd Woodbridge were the defending champions, but lost in the third round to Leander Paes and David Rikl.
The 2002 Canada Masters doubles was the men's doubles event of the one hundred and thirteenth edition of the Canada Masters; a WTA Tier I tournament and the most prestigious men's tennis tournament held in Canada. Jiří Novák and David Rikl were the defending champions but they competed with different partners that year, Novák with Radek Štěpánek and Rikl with David Prinosil. Novak and Štěpánek lost in the second round to Mark Knowles and Daniel Nestor. Prinosil and Rikl lost in the semifinals to Bob Bryan and Mike Bryan. The Bryans won in the final 4–6, 7–6(7–1), 6–3 against Knowles and Nestor.
Mark Knowles and Daniel Nestor won in the final 6–3, 7–5, 6–0 against Mahesh Bhupathi and Max Mirnyi.
Ellis Ferreira and Rick Leach were the defending champions but they competed with different partners that year, Ferreira with Pavel Vízner and Leach with Brian MacPhie.
Mark Knowles and Daniel Nestor were the defending champions but lost in the quarterfinals to Leander Paes and David Rikl.
Mark Knowles and Daniel Nestor were the defending champions but lost in the quarterfinals to Roger Federer and Max Mirnyi.
Martin Damm and Cyril Suk were the defending champions but lost in the semifinals to Michaël Llodra and Fabrice Santoro.
The 2003 Hamburg Masters doubles was a German tennis event.
Bob Bryan and Mike Bryan were the defending champions but lost in the first round to James Blake and Martin Verkerk.
Martin Damm and Cyril Suk were the defending champions and won in the final 6–2, 6–4 against Stefan Koubek and Andy Roddick.
Sébastien Grosjean and Fabrice Santoro were the defending champions but did not compete that year.
Leander Paes and David Rikl were the defending champions but only Paes competed that year with Jonas Björkman.
Mark Knowles and Daniel Nestor were the defending champions but lost in the second round to Joshua Eagle and Andrew Florent.
Mark Knowles and Daniel Nestor were the defending champions. They finished runner-up this year.
Yves Allegro and Roger Federer were the defending champions, but did not participate this year.
Martin Damm and Cyril Suk were the defending champions, but Damm did not participate this year. Suk partnered Pavel Vízner, losing in the semifinals.
Mark Knowles and Daniel Nestor were the defending champions, but lost in the first round to Paul Goldstein and Jim Thomas.
Bob and Mike Bryan were the defending champions, but lost in second round to Jonathan Erlich and Andy Ram.
Mark Knowles and Daniel Nestor were the defending champions, but lost in Quarterfinals to Wayne Black and Kevin Ullyett.
Bob Bryan and Mike Bryan were the defending champions but did not compete that year.
