# 1991 Canadian Open – Men's doubles

Paul Annacone and David Wheaton were the defending champions, but Wheaton chose not to participate. Annacone partnered with Doug Flach, but lost to Jim Grabb and Richey Reneberg in the first round.
Patrick Galbraith and Todd Witsken won the title, defeating Grant Connell and Glenn Michibata in the finals, 6–4, 3–6, 6–1.

## Seeds

The top four seeded teams received byes into the second round.
* Scott Davis / David Pate (quarterfinals)
* Grant Connell / Glenn Michibata (finals)
* Patrick Galbraith / Todd Witsken (champions)
* Luke Jensen / Laurie Warder (quarterfinals)
* Jim Courier / Jakob Hlasek (quarterfinals)
* Wally Masur / Mark Woodforde (semifinals)
* Broderick Dyke / Peter Lundgren (first round)
* Ken Flach / Robert Seguso (semifinals)

## Draw
### Key

* Q = Qualifier
* WC = Wild card
* LL = Lucky loser
* Alt = Alternate
* SE = Special exempt
* PR = Protected ranking
* ITF = ITF entry
* JE = Junior exempt
* w/o = Walkover
* r = Retired
* d = Defaulted
* SR = Special ranking

### Finals

| Semifinals | Semifinals | Semifinals | Semifinals | Semifinals | Final | Final | Final | Final | Final |
| 8 | Ken Flach Robert Seguso | 4 | 4 | | | | | | |
| 3 | Patrick Galbraith Todd Witsken | 6 | 6 | | | | | | |
| 3 | Patrick Galbraith Todd Witsken | 6 | 6 | | 3 | Patrick Galbraith Todd Witsken | 6 | 3 | 6 |
| | | | | | 2 | Grant Connell Glenn Michibata | 4 | 6 | 1 |
| 6 | Wally Masur Mark Woodforde | 3 | 6 | 3 | 2 | Grant Connell Glenn Michibata | 4 | 6 | 1 |
| 2 | Grant Connell Glenn Michibata | 6 | 3 | 6 | | | | | |

### Top half

| First round | First round | First round | First round | First round | Second round | Second round | Second round | Second round | Second round | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Semifinals | Semifinals | Semifinals | Semifinals |
| | | | | | 1 | S Davis D Pate | 6 | 6 | | | | | | | | | | |
| | G Bloom P Korda | 7 | 6 | | | G Bloom P Korda | 3 | 4 | | | | | | | | | | |
| Q | A Mronz M Washington | 5 | 4 | | | | | | | 1 | S Davis D Pate | 6 | 3 | 4 | | | | |
| | J Grabb R Reneberg | 7 | 5 | 6 | | | | | | 8 | K Flach R Seguso | 3 | 6 | 6 | | | | |
| | P Annacone D Flach | 6 | 7 | 3 | | J Grabb R Reneberg | 6 | 3 | 2 | | | | | | | | | |
| | S DeVries D Macpherson | 6 | 4 | | 8 | K Flach R Seguso | 4 | 6 | 6 | | | | | | | | | |
| 8 | K Flach R Seguso | 7 | 6 | | | | | | | | | | | | 8 | K Flach R Seguso | 4 | 4 |
| | | | | | | | | | | | | | | | 3 | P Galbraith T Witsken | 6 | 6 |
| | | | | | 3 | P Galbraith T Witsken | 7 | 6 | | | | | | | | | | |
| | J Arias K Thorne | 7 | 6 | | | J Arias K Thorne | 6 | 3 | | | | | | | | | | |
| Q | G Failla T Mercer | 5 | 1 | | | | | | | 3 | P Galbraith T Witsken | 6 | 6 | 6 | | | | |
| | D Nestor G Rusedski | 4 | 4 | | | | | | | 5 | J Courier J Hlasek | 4 | 7 | 4 | | | | |
| | P McEnroe P Sampras | 6 | 6 | | | P McEnroe P Sampras | 6 | 4 | | | | | | | | | | |
| | H Holm J Kriek | 6 | 4 | | 5 | J Courier J Hlasek | 7 | 6 | | | | | | | | | | |
| 5 | J Courier J Hlasek | 7 | 6 | | | | | | | | | | | | | | | |

### Bottom half

| First round | First round | First round | First round | First round | Second round | Second round | Second round | Second round | Second round | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Semifinals | Semifinals | Semifinals | Semifinals | Semifinals |
| 6 | W Masur M Woodforde | 6 | 6 | | | | | | | | | | | | | | | | |
| | N Borwick S Youl | 1 | 4 | | 6 | W Masur M Woodforde | 7 | 3 | 7 | | | | | | | | | | |
| | G Pozzi D Rostagno | 4 | 4 | | | T Svantesson G Van Emburgh | 6 | 6 | 5 | | | | | | | | | | |
| | T Svantesson G Van Emburgh | 6 | 6 | | | | | | | 6 | W Masur M Woodforde | 6 | 6 | 6 | | | | | |
| | J Brown B Garnett | 6 | 5 | | | | | | | 4 | L Jensen L Warder | 7 | 4 | 4 | | | | | |
| | S Cannon R Smith | 7 | 7 | | | S Cannon R Smith | 7 | 4 | 4 | | | | | | | | | | |
| | | | | | 4 | L Jensen L Warder | 6 | 6 | 6 | | | | | | | | | | |
| | | | | | | | | | | | | | | | 6 | W Masur M Woodforde | 3 | 6 | 3 |
| 7 | B Dyke P Lundgren | 4 | 1 | | | | | | | | | | | | 2 | G Connell G Michibata | 6 | 3 | 6 |
| | U Colombini S Pescosolido | 6 | 6 | | | U Colombini S Pescosolido | 5 | 7 | 3 | | | | | | | | | | |
| | S Lareau S Leblanc | 6 | 1 | 6 | | S Lareau S Leblanc | 7 | 6 | 6 | | | | | | | | | | |
| | B Gilbert I Lendl | 4 | 6 | 2 | | | | | | | S Lareau S Leblanc | 3 | 6 | | | | | | |
| | K Kinnear B Pearce | 6 | 7 | 6 | | | | | | 2 | G Connell G Michibata | 6 | 7 | | | | | | |
| | C Beckman S Salumaa | 7 | 6 | 1 | | K Kinnear B Pearce | 6 | 4 | | | | | | | | | | | |
| | | | | | 2 | G Connell G Michibata | 7 | 6 | | | | | | | | | | | |