The 2001 Canada Masters doubles was the men's doubles event of the one hundred and twelfth edition of the Canada Masters; a WTA Tier I tournament and the most prestigious men's tennis tournament held in Canada. Sébastien Lareau and Daniel Nestor were the defending champions but they competed with different partners that year, Lareau with Justin Gimelstob and Nestor with Sandon Stolle. Gimelstob and Lareau lost in the first round to Mark Knowles and Brian MacPhie, as did Nestor and Stolle to Jan-Michael Gambill and Simon Larose. Jiří Novák and David Rikl won in the final 6–4, 3–6, 6–3 against Donald Johnson and Jared Palmer.
Jonas Björkman and Todd Woodbridge were the defending champions, but lost in the second round to Tomáš Cibulec and Daniel Vacek.
Jiří Novák and David Rikl were the defending champions but lost in the quarterfinals to Tomás Carbonell and Nicolás Lapentti.
Jiří Novák and David Rikl were the defending champions but lost in the second round to Tomás Carbonell and Nicolás Lapentti.
Todd Woodbridge and Mark Woodforde were the defending champions but only Woodbridge competed that year with Jonas Björkman.
Jiří Novák and David Rikl were the defending champions but lost in the semifinals to Ellis Ferreira and Jeff Tarango.
Mark Knowles and Daniel Nestor were the defending champions but lost in the quarterfinals to Rainer Schüttler and Mikhail Youzhny.
Wayne Black and Kevin Ullyett were the defending champions but did not compete that year.
Jiří Novák and David Rikl were the defending champions but lost in the second round to Chris Haggard and Tom Vanhoudt.
Wayne Ferreira and Yevgeny Kafelnikov were the defending champions but lost in the second round to Wayne Black and Kevin Ullyett.
Nicklas Kulti and Max Mirnyi were the defending champions but only Mirnyi competed that year with Sandon Stolle.
David Adams and Robbie Koenig were the defending champions of the doubles event of the Heineken Open tennis tournament, held in Auckland, New Zealand, but only Koenig competed that year with Petr Pála. Koenig and Pála lost in the first round to Jan-Michael Gambill and Brian MacPhie.
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 French Open was the second Grand Slam event of 2001 and the 100th edition of the French Open. It took place at the Stade Roland Garros in Paris, France, from late May through early June, 2001.
The 2001 US Open was held between August 27 – September 9, 2001. It was the final Grand Slam event of 2001.
Donald Johnson and Kimberly Po-Messerli were the defending champions but lost in the quarterfinals to Leoš Friedl and Daniela Hantuchová.
Jiří Novák and Petr Pála were the defending champions, but chose not to participate.
Jiří Novák and Radek Štěpánek were the defending champions, but Štěpánek did not compete this year. Novák teamed up with Petr Pála and lost in the first round to František Čermák and Leoš Friedl.
Tomáš Cibulec and Pavel Vízner were the defending champions, but competed this year with different partners. Cibulec teamed up with Petr Pála and lost in the first round to Guillermo Cañas and Feliciano López, while Vízner teamed up with Jared Palmer and lost in the first round to Simon Aspelin and Todd Perry.
Jared Palmer 
Pavel Vízner 
