| Men's doubles | |
|---|---|
| 2003 Pacific Life Open | |
| Champions | |
| Runners-up | |
| Score | 3–6, 7–5, 6–4 |
Mark Knowles and Daniel Nestor were the defending champions but lost in the quarterfinals to Leander Paes and David Rikl.
Wayne Ferreira and Yevgeny Kafelnikov won in the final 3–6, 7–5, 6–4 against Bob Bryan and Mike Bryan.
All eight seeded teams received byes to the second round.
Mark Knowles / 
Daniel Nestor (quarterfinals)
Jonas Björkman / 
Todd Woodbridge (semifinals)
Bob Bryan / Mike Bryan (final) Donald Johnson / Jared Palmer (second round)
Martin Damm / Cyril Suk (quarterfinals)
Roger Federer / 
Max Mirnyi (quarterfinals)
Michaël Llodra / Fabrice Santoro (second round)
Leander Paes / David Rikl (semifinals)| Semifinals | Final | ||||||||||||
| 8 | 3 | 66 | |||||||||||
| 3 | 6 | 78 | |||||||||||
| 3 | 6 | 5 | 4 | ||||||||||
| 3 | 7 | 6 | |||||||||||
| 5 | 6 | 7 | |||||||||||
| 2 | 7 | 3 | 5 | ||||||||||
| First round | Second round | Quarterfinals | Semifinals | ||||||||||||||||||||||||
| 1 | 6 | 6 | |||||||||||||||||||||||||
| ALT | 67 | 1 | WC | 3 | 2 | ||||||||||||||||||||||
| WC | 79 | 6 | 1 | 4 | 64 | ||||||||||||||||||||||
| 5 | 3 | 8 | 6 | 77 | |||||||||||||||||||||||
| 7 | 6 | 2 | 6 | 2 | |||||||||||||||||||||||
| 8 | 6 | 3 | 6 | ||||||||||||||||||||||||
| 8 | 3 | 66 | |||||||||||||||||||||||||
| 3 | 6 | 78 | |||||||||||||||||||||||||
| 3 | 6 | 4 | 6 | ||||||||||||||||||||||||
| 3 | 4 | 4 | 6 | 4 | |||||||||||||||||||||||
| 6 | 6 | 3 | 6 | 6 | |||||||||||||||||||||||
| 6 | 6 | 5 | 4 | 3 | |||||||||||||||||||||||
| 2 | 3 | 65 | 3 | ||||||||||||||||||||||||
| 5 | 77 | 6 | |||||||||||||||||||||||||
| First round | Second round | Quarterfinals | Semifinals | ||||||||||||||||||||||||
| 7 | 6 | 1 | 4 | ||||||||||||||||||||||||
| 6 | 6 | 3 | 6 | 6 | |||||||||||||||||||||||
| 3 | 3 | 77 | 4 | 77 | |||||||||||||||||||||||
| WC | 4 | 4 | 61 | 6 | 61 | ||||||||||||||||||||||
| 6 | 6 | 7 | 5 | 78 | |||||||||||||||||||||||
| 4 | 5 | 7 | 66 | ||||||||||||||||||||||||
| 5 | 6 | 7 | |||||||||||||||||||||||||
| 2 | 7 | 3 | 5 | ||||||||||||||||||||||||
| 6 | 6 | 6 | |||||||||||||||||||||||||
| 67 | 5 | 1 | 4 | ||||||||||||||||||||||||
| 79 | 7 | 6 | 4 | 6 | 3 | ||||||||||||||||||||||
| 2 | 6 | 64 | 2 | 6 | 4 | 6 | |||||||||||||||||||||
| 6 | 3 | 77 | 4 | 7 | 2 | ||||||||||||||||||||||
| 2 | 6 | 5 | 6 | ||||||||||||||||||||||||
Jonas Björkman and Todd Woodbridge were the defending champions, but lost in the third round to Leander Paes and David Rikl.
Bob and Mike Bryan were the defending champions, they lost to sixth-seeded Michaël Llodra and Fabrice Santoro in the semifinals.
Paul Haarhuis and Yevgeny Kafelnikov were defending champions, but they lost in the final to third seeds Bob and Mike Bryan, who won the first Grand Slam title of their careers.
The 2003 Canada Masters doubles was the men's doubles event of the one hundred and fourteenth edition of the Canada Masters; a WTA Tier I tournament and the most prestigious men's tennis tournament held in Canada. Bob Bryan and Mike Bryan were the defending champions but lost in the semifinals to Jonas Björkman and Todd Woodbridge. Mahesh Bhupathi and Max Mirnyi won in the final 6–3, 7–6(7–4) against Björkman and Woodbridge.
Mahesh Bhupathi and Pavel Vízner were the defending champions. They were both present but did not compete together.
Bhupathi partnered with Mark Knowles, but lost in the quarterfinals to Lukáš Dlouhý and Leander Paes
Vízner partnered with Martin Damm, but lost in the second round to Mario Ančić and Jeff Coetzee.
Daniel Nestor and Nenad Zimonjić defeated Bob Bryan and Mike Bryan in the final, 6–4, 6–1, to win the doubles tennis title at the 2009 Monte-Carlo Masters. Nestor completed the career Golden Masters in doubles with the win.
Mark Knowles and Daniel Nestor were the defending champions, but lost in the final to Michaël Llodra and Fabrice Santoro.
Jonas Björkman and Todd Woodbridge were the defending champions, but lost in the second round to Tomáš Cibulec and Daniel Vacek.
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.
Mark Knowles and Daniel Nestor were the defending champions but lost in the quarterfinals to Roger Federer and Max Mirnyi.
Jonas Björkman and Todd Woodbridge were the defending champions but lost in the second round to František Čermák and Leoš Friedl.
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.
James Blake and Todd Martin were the defending champions but lost in the second round to Wayne Arthurs and Paul Hanley.
Wayne Ferreira and Yevgeny Kafelnikov were the defending champions but did not compete that year.
Roger Federer and Max Mirnyi were the defending champions but only Mirnyi competed that year with Mahesh Bhupathi.
Wayne Black and Kevin Ullyett were the defending champions, but lost in the quarterfinals to Mahesh Bhupati and Max Mirnyi.
Todd Woodbridge and Mark Woodforde were the defending champions, but Woodforde had retired from the tour. Woodbridge partnered with Jonas Björkman but lost in the third round to Bob and Mike Bryan.
Mahesh Bhupathi and Leander Paes were the defending champions, but did not participate together. Paes played with Tomáš Cibulec but they lost in the semifinals to Mark Knowles and Daniel Nestor. Bhupathi partnered with Max Mirnyi but they lost in semifinals to Paul Haarhuis and Yevgeny Kafelnikov.
The 2001 US Open was held between August 27 – September 9, 2001. It was the final Grand Slam event of 2001.
