| Doubles | |
|---|---|
| 2004 Siebel Open | |
| Champions |  James Blake Mardy Fish |
| Runners-up | Rick Leach Brian MacPhie |
| Final score | 6–2, 7–5 |
| Draw | 16 |
| Seeds | 4 |
Hyung-Taik Lee and Vladimir Voltchkov were the defending champions but only Lee competed that year with Brian Vahaly.
Lee and Vahaly lost in the quarterfinals to Jeff Coetzee and Chris Haggard.
James Blake and Mardy Fish won in the final 6–2, 7–5 against Rick Leach and Brian MacPhie.
Champion seeds are indicated in bold text while text in italics indicates the round in which those seeds were eliminated.
Scott Humphries / 
Mark Merklein (first round)
Jordan Kerr / Jim Thomas (quarterfinals) Todd Perry / 
Thomas Shimada (quarterfinals) Rick Leach / Brian MacPhie (final)| First round | Quarterfinals | Semifinals | Final | ||||||||||||||||||||||||
| 1 | S Humphries M Merklein | 63 | 6 | 66 | |||||||||||||||||||||||
 J Coetzee C Haggard | 77 | 3 | 78 | J Coetzee C Haggard | 6 | 6 | |||||||||||||||||||||
 H-T Lee B Vahaly | 6 | 3 | 77 | H-T Lee B Vahaly | 3 | 3 | |||||||||||||||||||||
| WC | B Coupe  D Tursunov | 3 | 6 | 62 | J Coetzee C Haggard | 65 | 6 | 3 | |||||||||||||||||||
| 4 | R Leach B MacPhie | 77 | 6 | 4 | R Leach B MacPhie | 77 | 4 | 6 | |||||||||||||||||||
| J-M Gambill T Parrott | 64 | 4 | 4 | R Leach B MacPhie | 7 | 0 | 6 | ||||||||||||||||||||
 N Kiefer W Moodie | 6 | 6 | N Kiefer W Moodie | 5 | 6 | 4 | |||||||||||||||||||||
| D Ayala R Ginepri | 3 | 3 | 4 | Rick Leach Brian MacPhie | 2 | 5 | |||||||||||||||||||||
| WC | H Cicma G Schweitzer | 1 | 3 | James Blake Mardy Fish | 6 | 7 | |||||||||||||||||||||
K Braasch  J Melzer | 6 | 6 | K Braasch J Melzer | 3 | 7 | 6 | |||||||||||||||||||||
 I Labadze  C Saulnier | 6 | 3 | 4 | 3 | T Perry T Shimada | 6 | 5 | 3 | |||||||||||||||||||
| 3 | T Perry T Shimada | 3 | 6 | 6 | K Braasch J Melzer | 3 | 5 | ||||||||||||||||||||
| J Blake M Fish | 6 | 6 | J Blake M Fish | 6 | 7 | ||||||||||||||||||||||
 X Malisse T Vanhoudt | 4 | 2 | J Blake M Fish | 6 | 6 | ||||||||||||||||||||||
| P Goldstein V Spadea | 6 | 5 | 4 | 2 | J Kerr J Thomas | 4 | 3 | ||||||||||||||||||||
| 2 | J Kerr J Thomas | 4 | 7 | 6 | |||||||||||||||||||||||
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.
Jan-Michael Gambill and Scott Humphries were the defending champions but they competed with different partners that year, Gambill with Jonathan Stark and Humphries with Justin Gimelstob.
Lleyton Hewitt and Sandon Stolle were the defending champions but only Stolle competed that year with Max Mirnyi.
Donald Johnson and Piet Norval were the defending champions but only Johnson competed that year with Jared Palmer.
Mahesh Bhupathi and Leander Paes were the defending champions but only Paes competed that year with John-Laffnie de Jager.
Jonas Björkman and Todd Woodbridge were the defending champions but lost in the final 6–2, 6–4 against Mahesh Bhupathi and Jan-Michael Gambill.
Rick Leach and David Macpherson were the defending champions but lost in the semifinals to Jan-Michael Gambill and Graydon Oliver.
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.
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.
Wayne Black and Kevin Ullyett were the defending champions but only Black competed that year with Mark Philippoussis.
Mahesh Bhupathi and Leander Paes were the defending champions but did not compete that year.
Mark Knowles and Daniel Nestor were the defending champions but lost in the semifinals to James Blake and Mardy Fish.
Jared Palmer and Richey Reneberg were the defending champions but only Reneberg competed that year with Jim Grabb.
Todd Woodbridge and Mark Woodforde were the defending champions and won in the final 6–1, 6–3 against Ellis Ferreira and Patrick Galbraith.
Olivier Delaître and Jeff Tarango were the defending champions but did not compete that year.
Mark Knowles and Daniel Nestor were the defending champions but lost in the second round to Joshua Eagle and Andrew Florent.
Trevor Kronemann and David Macpherson were the defending champions but lost in the semifinals to Mark Knowles and Daniel Nestor.
Rick Leach and Brian MacPhie were the defending champions, but lost in the first round this year.
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.