1989 Player's Canadian Open – Men's singles
# 1989 Player's Canadian Open – Men's singles

Ivan Lendl was the defending champion.

Lendl successfully defended his title, defeating John McEnroe 6–1, 6–3 in the final.

## Seeds

* Ivan Lendl (champion)
* John McEnroe (final)
* Andre Agassi (semifinals)
* Tim Mayotte (third round)
* Kevin Curren (third round)
* Jay Berger (semifinals)
* Miloslav Mečíř (second round)
* Yannick Noah (second round)
* Guillermo Pérez Roldán (second round)
* Goran Ivanišević (first round)
* Glenn Layendecker (first round)
* Andrew Sznajder (quarterfinals)
* Kelly Evernden (third round)
* Todd Witsken (second round)
* Richey Reneberg (third round)
* Jimmy Arias (third round)

## 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 |
| - | - | - | - | - | - | - | - | - |
| 1 | Ivan Lendl | 6 | 3 | 6 | | | | |
| 3 | Andre Agassi | 2 | 6 | 4 | | | | |
| 3 | Andre Agassi | 2 | 6 | 4 | 1 | Ivan Lendl | 6 | 6 |
| | | | | | 2 | John McEnroe | 1 | 3 |
| 6 | Jay Berger | 6 | 3 | 4 | 2 | John McEnroe | 1 | 3 |
| 2 | John McEnroe | 4 | 6 | 6 | | | | |

### Top half

**Section 1**

| First round | First round | First round | First round | First round | Second round | Second round | Second round | Second round | Second round | Third round | Third round | Third round | Third round | Third round | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals |
| - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
| | | | | | 1 | I Lendl | 7 | 6 | | | | | | | | | | | |
| | K Jones | 6 | 7 | 7 | | K Jones | 6 | 1 | | | | | | | | | | | |
| Q | S Stolle | 7 | 6 | 6 | | | | | | 1 | I Lendl | 3 | 6 | 6 | | | | | |
| | J Tarango | 6 | 6 | | | | | | | 16 | J Arias | 6 | 1 | 4 | | | | | |
| | M Šrejber | 4 | 4 | | | J Tarango | 2 | 2 | | | | | | | | | | | |
| | T Högstedt | 0 | 2 | | 16 | J Arias | 6 | 6 | | | | | | | | | | | |
| 16 | J Arias | 6 | 6 | | | | | | | | | | | | 1 | I Lendl | 7 | 4 | 6 |
| 10 | G Ivanišević | 3 | 4 | | | | | | | | | | | | | G Connell | 6 | 6 | 0 |
| | J Canter | 6 | 6 | | | J Canter | 6 | 7 | | | | | | | | | | | |
| | M Laurendeau | 6 | 6 | 6 | | M Laurendeau | 3 | 5 | | | | | | | | | | | |
| WC | R Janecek | 2 | 7 | 1 | | | | | | | J Canter | 3 | 7 | 5 | | | | | |
| Q | M Walker | 3 | 5 | | | | | | | | G Connell | 6 | 5 | 7 | | | | | |
| | G Connell | 6 | 7 | | | G Connell | 6 | 4 | 6 | | | | | | | | | | |
| | | | | | 7 | M Mečíř | 2 | 6 | 4 | | | | | | | | | | |

**Section 2**

| First round | First round | First round | First round | First round | Second round | Second round | Second round | Second round | Second round | Third round | Third round | Third round | Third round | Third round | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals |
| - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
| | | | | | 3 | A Agassi | 6 | 3 | 6 | | | | | | | | | |
| Q | S Cannon | 6 | 6 | | Q | S Cannon | 3 | 6 | 3 | | | | | | | | | |
| | M Greenan | 4 | 1 | | | | | | | 3 | A Agassi | 6 | 3 | 7 | | | | |
| | L Shiras | 4 | 6 | 6 | | | | | | 13 | K Evernden | 2 | 6 | 5 | | | | |
| | J Bates | 6 | 3 | 0 | | L Shiras | 4 | 6 | 4 | | | | | | | | | |
| | C Pridham | 6 | 4 | | 13 | K Evernden | 6 | 0 | 6 | | | | | | | | | |
| 13 | K Evernden | 7 | 6 | | | | | | | | | | | | 3 | A Agassi | 6 | 6 |
| 12 | A Sznajder | 7 | 6 | 7 | | | | | | | | | | | 12 | A Sznajder | 1 | 0 |
| | N Odizor | 6 | 7 | 6 | 12 | A Sznajder | 6 | 6 | | | | | | | | | | |
| WC | S Leblanc | 1 | 6 | | | J-P Fleurian | 2 | 4 | | | | | | | | | | |
| | J-P Fleurian | 6 | 7 | | | | | | | 12 | A Sznajder | 6 | 2 | 6 | | | | |
| | C Limberger | 5 | 6 | 7 | | | | | | 5 | K Curren | 2 | 6 | 3 | | | | |
| | J Carlsson | 7 | 4 | 6 | | C Limberger | 4 | 5 | | | | | | | | | | |
| | | | | | 5 | K Curren | 6 | 7 | | | | | | | | | | |

**Section 3**

| First round | First round | First round | First round | First round | Second round | Second round | Second round | Second round | Third round | Third round | Third round | Third round | Third round | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals |
| - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
| | | | | | 6 | J Berger | w/o | | | | | | | | | | | |
| Q | G Failla | 4 | 4 | | | S Youl | | | | | | | | | | | | |
| | S Youl | 6 | 6 | | | | | | 6 | J Berger | 6 | 7 | | | | | | |
| | S Giammalva Jr. | 6 | 7 | | | | | | | S Giammalva Jr. | 3 | 5 | | | | | | |
| Q | T Ho | 4 | 5 | | | S Giammalva Jr. | 6 | 6 | | | | | | | | | | |
| Q | C Garner | 2 | 7 | 7 | Q | C Garner | 0 | 1 | | | | | | | | | | |
| 11 | G Layendecker | 6 | 6 | 5 | | | | | | | | | | 6 | J Berger | 6 | 6 | 6 |
| 14 | T Witsken | 6 | 6 | | | | | | | | | | | | N Pereira | 7 | 1 | 3 |
| WC | S Lareau | 1 | 1 | | 14 | T Witsken | 3 | 1 | | | | | | | | | | |
| | N Pereira | 6 | 6 | | | N Pereira | 6 | 6 | | | | | | | | | | |
| | Y Doumbia | 1 | 3 | | | | | | | N Pereira | 6 | 1 | 6 | | | | | |
| Q | C Beckman | 2 | 2 | | | | | | 4 | T Mayotte | 3 | 6 | 3 | | | | | |
| | P Pech | 6 | 6 | | | P Pech | 2 | 6 | | | | | | | | | | |
| | | | | | 4 | T Mayotte | 6 | 7 | | | | | | | | | | |

**Section 4**

| First round | First round | First round | First round | First round | Second round | Second round | Second round | Second round | Second round | Third round | Third round | Third round | Third round | Third round | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals |
| - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
| | | | | | 8 | Y Noah | 3 | 7 | 6 | | | | | | | | | | |
| | D Cassidy | 2 | 3 | | | A Antonitsch | 6 | 6 | 7 | | | | | | | | | | |
| | A Antonitsch | 6 | 6 | | | | | | | | A Antonitsch | 3 | 6 | 6 | | | | | |
| | D Nargiso | 6 | 7 | 6 | | | | | | | D Nargiso | 6 | 3 | 3 | | | | | |
| | R Smith | 7 | 5 | 1 | | D Nargiso | 6 | 6 | | | | | | | | | | | |
| | M Wostenholme | 7 | 4 | 2 | 9 | G Pérez Roldán | 4 | 2 | | | | | | | | | | | |
| 9 | G Pérez Roldán | 6 | 6 | 6 | | | | | | | | | | | | A Antonitsch | 5 | 6 | 3 |
| 15 | R Reneberg | 6 | 6 | | | | | | | | | | | | 2 | J McEnroe | 7 | 2 | 6 |
| | B Garnett | 3 | 4 | | 15 | R Reneberg | 3 | 7 | 6 | | | | | | | | | | |
| | R Fromberg | 6 | 6 | 6 | | R Fromberg | 6 | 5 | 1 | | | | | | | | | | |
| | G Michibata | 7 | 4 | 4 | | | | | | 15 | R Reneberg | 3 | 6 | | | | | | |
| | N Caswell | 6 | 6 | | | | | | | 2 | J McEnroe | 6 | 7 | | | | | | |
| WC | D Nestor | 3 | 3 | | | N Caswell | 2 | 6 | 3 | | | | | | | | | | |
| | | | | | 2 | J McEnroe | 6 | 4 | 6 | | | | | | | | | | |
