# 2003 Canada Masters – Singles

Andy Roddick defeated David Nalbandian in the final, 6–1, 6–3 to win the men's singles tennis title at the 2003 Canada Masters.
Guillermo Cañas was the reigning champion, but did not compete that year.

## Seeds

A champion seed is indicated in bold text while text in italics indicates the round in which that seed was eliminated.
* Andre Agassi (quarterfinals)
* Juan Carlos Ferrero (third round)
* Roger Federer (semifinals)
* Carlos Moyá (first round)
* Lleyton Hewitt (second round)
* Andy Roddick (champion)
* Guillermo Coria (first round)
* Rainer Schüttler (semifinals)
* Sébastien Grosjean (third round)
* Jiří Novák (third round)
* Paradorn Srichaphan (third round)
* Sjeng Schalken (first round)
* Gustavo Kuerten (first round)
* Fernando González (first round)
* Martin Verkerk (second round)
* Tommy Robredo (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

| Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Semifinals | Semifinals | Semifinals | Semifinals | Semifinals | Final | Final | Final | Final |
| 1 | Andre Agassi | 6 | 2 | 3 | | | | | | | | | |
| 8 | Rainer Schüttler | 2 | 6 | 6 | | | | | | | | | |
| 8 | Rainer Schüttler | 2 | 6 | 6 | 8 | Rainer Schüttler | 6 | 2 | 2 | | | | |
| | | | | | | David Nalbandian | 3 | 6 | 6 | | | | |
| | David Nalbandian | 6 | 6 | | | David Nalbandian | 3 | 6 | 6 | | | | |
| | Feliciano López | 4 | 4 | | | | | | | | | | |
| | Feliciano López | 4 | 4 | | | | | | | | David Nalbandian | 1 | 3 |
| | | | | | | | | | | 6 | Andy Roddick | 6 | 6 |
| | Max Mirnyi | 2 | 6$^3$ | | | | | | | | | | | 6 | Andy Roddick | 6 | 6 |
| 3 | Roger Federer | 6 | 7$^7$ | | | | | | | | | | |
| 3 | Roger Federer | 6 | 7$^7$ | | 3 | Roger Federer | 4 | 6 | 6$^3$ | | | | |
| | | | | | 6 | Andy Roddick | 6 | 3 | 7$^7$ | | | | |
| 6 | Andy Roddick | 7$^7$ | 6 | | 6 | Andy Roddick | 6 | 3 | 7$^7$ | | | | |
| | Karol Kučera | 6$^5$ | 3 | | | | | | | | | | |

### 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 | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals |
| 1 | A Agassi | 6 | 6 | | | | | | | | | | | | | | | |
| WC | F Niemeyer | 4 | 2 | | 1 | A Agassi | 7$^7$ | 6 | | | | | | | | | | |
| | N Davydenko | 7$^7$ | 4 | 6 | | N Davydenko | 6$^3$ | 2 | | | | | | | | | | |
| WC | F Dancevic | 6$^3$ | 6 | 3 | | | | | | 1 | A Agassi | 6 | 6 | | | | | |
| | F Santoro | 6 | 3 | 4 | | | | | | | S Larose | 4 | 2 | | | | | |
| | J Acasuso | 2 | 6 | 6 | | J Acasuso | 6$^5$ | 6 | 5 | | | | | | | | | |
| WC | S Larose | 7 | 7$^7$ | | WC | S Larose | 7$^7$ | 1 | 7 | | | | | | | | | |
| 13 | G Kuerten | 5 | 6$^2$ | | | | | | | | | | | 1 | A Agassi | 6 | 2 | 3 |
| 10 | J Novák | 7 | 3 | 6 | | | | | | | | | | 8 | R Schüttler | 2 | 6 | 6 |
| | M Ančić | 5 | 6 | 3 | 10 | J Novák | 7$^7$ | 6 | | | | | | | | | | |
| | R Štěpánek | 6$^3$ | 4 | | | J Blake | 6$^5$ | 3 | | | | | | | | | | |
| | J Blake | 7$^7$ | 6 | | | | | | | 10 | J Novák | 5 | 0 | | | | | |
| | Y Kafelnikov | 1 | 6 | 6 | | | | | | 8 | R Schüttler | 7 | 6 | | | | | |
| Q | G Carraz | 6 | 2 | 4 | | Y Kafelnikov | 1 | 4 | | | | | | | | | | |
| | M Youzhny | 2 | 4 | | 8 | R Schüttler | 6 | 6 | | | | | | | | | | |
| 8 | R Schüttler | 6 | 6 | | | | | | | | | | | | | | | |

#### 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 | Quarterfinals | Quarterfinals | Quarterfinals |
| 4 | C Moyá | 6$^4$ | 6 | 3 | | | | | | | | | | | | |
| | A Clément | 7$^7$ | 4 | 6 | | A Clément | 0 | 7$^7$ | 5 | | | | | | | |
| | V Spadea | 6 | 6 | | | V Spadea | 6 | 6$^5$ | 7 | | | | | | | |
| | R Sluiter | 3 | 4 | | | | | | | | V Spadea | 4 | 2 | | | |
| | J Nieminen | 6$^5$ | 6$^5$ | | | | | | | | D Nalbandian | 6 | 6 | | | |
| | D Nalbandian | 7$^7$ | 7$^7$ | | | D Nalbandian | 6 | 6 | | | | | | | | |
| | T Henman | 6 | | | | T Henman | 4 | 4 | | | | | | | | |
| 14 | F González | 2 | r | | | | | | | | | | | D Nalbandian | 6 | 6 |
| 12 | S Schalken | 1 | 1 | | | | | | | | | | | F López | 4 | 4 |
| | M Zabaleta | 6 | 6 | | | M Zabaleta | 1 | 1 | | | | | | | | |
| Q | K Beck | 6$^6$ | 7$^7$ | 6 | Q | K Beck | 6 | 6 | | | | | | | | |
| Q | M Llodra | 7$^8$ | 6$^3$ | 1 | | | | | | Q | K Beck | 4 | 6$^3$ | | | |
| | P-H Mathieu | 7$^7$ | 6 | | | | | | | | F López | 6 | 7$^7$ | | | |
| Q | S Draper | 6$^5$ | 4 | | | P-H Mathieu | 4 | 6 | 5 | | | | | | | |
| | F López | 6 | | | | F López | 6 | 3 | 7 | | | | | | | |
| 7 | G Coria | 3 | r | | | | | | | | | | | | | |

### Bottom half
#### Section 3

| 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 | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals |
| 5 | L Hewitt | 6 | 6 | | | | | | | | | | | | | | |
| Q | B Bryan | 2 | 2 | | 5 | L Hewitt | 5 | 7$^7$ | 5 | | | | | | | | |
| LL | N Massú | 4 | 6$^4$ | | | M Mirnyi | 7 | 6$^4$ | 7 | | | | | | | | |
| | M Mirnyi | 6 | 7$^7$ | | | | | | | | M Mirnyi | 6 | 6 | | | | |
| WC | D Nestor | 3 | 6 | 6 | | | | | | 11 | P Srichaphan | 3 | 2 | | | | |
| | R Ginepri | 6 | 3 | 4 | WC | D Nestor | 5 | 4 | | | | | | | | | |
| | A Martín | 0 | 6$^5$ | | 11 | P Srichaphan | 7 | 6 | | | | | | | | | |
| 11 | P Srichaphan | 6 | 7$^7$ | | | | | | | | | | | | M Mirnyi | 2 | 6$^3$ |
| 16 | T Robredo | 6 | 7$^7$ | | | | | | | | | | | 3 | R Federer | 6 | 7$^7$ |
| | H-T Lee | 4 | 6$^0$ | | 16 | T Robredo | 6 | 6 | | | | | | | | | |
| | W Ferreira | 4 | 1$^r$ | | Q | W Black | 0 | 2 | | | | | | | | | |
| Q | W Black | 6 | 2 | | | | | | | 16 | T Robredo | 4 | 3 | | | | |
| | N Lapentti | 5 | 3 | | | | | | | 3 | R Federer | 6 | 6 | | | | |
| | G Rusedski | 7 | 6 | | | G Rusedski | 4 | 3 | | | | | | | | | |
| | G Gaudio | 4 | 6 | 5 | 3 | R Federer | 6 | 6 | | | | | | | | | |
| 3 | R Federer | 6 | 3 | 7 | | | | | | | | | | | | | |

#### Section 4

| 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 | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals |
| 6 | A Roddick | 3 | 6 | 6 | | | | | | | | | | | | |
| | X Malisse | 6 | 0 | 2 | 6 | A Roddick | 7$^8$ | 6 | | | | | | | | |
| | A Calleri | 7 | 4 | 3 | | J I Chela | 6$^6$ | 2 | | | | | | | | |
| | J I Chela | 5 | 6 | 6 | | | | | 6 | A Roddick | 6 | 6 | | | | |
| Q | R Delgado | 7$^7$ | 7$^7$ | | | | | | 9 | S Grosjean | 3 | 3 | | | | |
| | I Ljubičić | 6$^0$ | 6$^3$ | | Q | R Delgado | 3 | 2 | | | | | | | | |
| | F Vicente | 3 | 3 | | 9 | S Grosjean | 6 | 6 | | | | | | | | |
| 9 | S Grosjean | 6 | 6 | | | | | | | | | | 6 | A Roddick | 7$^7$ | 6 |
| 15 | M Verkerk | 6 | 4 | 7 | | | | | | | | | | K Kučera | 6$^5$ | 3 |
| | S Sargsian | 2 | 6 | 5 | 15 | M Verkerk | 6$^8$ | 6$^3$ | | | | | | | | |
| | K Kučera | 7$^7$ | 7$^7$ | | | K Kučera | 7$^{10}$ | 7$^7$ | | | | | | | | |
| | J-M Gambill | 6$^3$ | 6$^3$ | | | | | | | K Kučera | 6 | 7 | | | | |
| | Y El Aynaoui | 6 | 6$^8$ | 6 | | | | | 2 | J C Ferrero | 3 | 5 | | | | |
| | M Fish | 3 | 7$^{10}$ | 3 | | Y El Aynaoui | 3 | 4 | | | | | | | | |
| Q | C Saulnier | 4 | 4 | | 2 | J C Ferrero | 6 | 6 | | | | | | | | |
| 2 | J C Ferrero | 6 | 6 | | | | | | | | | | | | | |

## Qualifying
### Qualifying seeds

* Nicolás Massú (qualifying competition, lucky loser)
* Jonas Björkman (qualifying competition)
* Hicham Arazi (qualifying competition)
* Karol Beck (qualified)
* Wayne Arthurs (first round)
* Todd Martin (first round)
* Grégory Carraz (qualified)
* Cyril Saulnier (qualified)
* Scott Draper (qualified)
* Wesley Moodie (first round)
* Thomas Enqvist (qualifying competition)
* Ivo Heuberger (first round)
* Jiří Vaněk (qualifying competition)
* Peter Luczak (qualifying competition)
* (n/a)
* Harel Levy (qualifying competition)

### Qualifiers

* Wayne Black
* Bob Bryan
* Scott Draper
* Karol Beck
* Ramón Delgado
* Michaël Llodra
* Grégory Carraz
* Cyril Saulnier

### Lucky loser

* Nicolás Massú

### Qualifying draw
#### First qualifier

| First round | First round | First round | First round | First round | Qualifying competition | Qualifying competition | Qualifying competition | Qualifying competition |
| 1 | Nicolás Massú | 6$^6$ | 6 | 6 | | | | |
| WC | Philip Gubenco | 7$^8$ | 2 | 3 | | | | |
| WC | Philip Gubenco | 7$^8$ | 2 | 3 | 1 | Nicolás Massú | 2 | 4 |
| | | | | | Alt | Wayne Black | 6 | 6 |
| | Noam Okun | 4 | 2 | | Alt | Wayne Black | 6 | 6 |
| Alt | Wayne Black | 6 | 6 | | | | | |

#### Second qualifier

| First round | First round | First round | First round | Qualifying competition | Qualifying competition | Qualifying competition | Qualifying competition |
| 2 | Jonas Björkman | 7$^7$ | 6 | | | | |
| | Andres Pedroso | 6$^0$ | 4 | | | | |
| | Andres Pedroso | 6$^0$ | 4 | 2 | Jonas Björkman | 4 | 6$^4$ |
| | | | | | Bob Bryan | 6 | 7$^7$ |
| | Bob Bryan | 6 | 6 | | Bob Bryan | 6 | 7$^7$ |
| 10 | Wesley Moodie | 3 | 3 | | | | |

#### Third qualifier

| First round | First round | First round | First round | Qualifying competition | Qualifying competition | Qualifying competition | Qualifying competition | Qualifying competition |
| 3 | Hicham Arazi | 6 | 6 | | | | | |
| | Nicolás Todero | 4 | 4 | | | | | |
| | Nicolás Todero | 4 | 4 | 3 | Hicham Arazi | 6 | 4 | 3 |
| | | | | 9 | Scott Draper | 4 | 6 | 6 |
| | Jaymon Crabb | 1 | 6$^4$ | 9 | Scott Draper | 4 | 6 | 6 |
| 9 | Scott Draper | 6 | 7$^7$ | | | | | |

#### Fourth qualifier

| First round | First round | First round | First round | Qualifying competition | Qualifying competition | Qualifying competition | Qualifying competition |
| 4 | Karol Beck | 6 | 6 | | | | |
| WC | Sanjin Sadovich | 1 | 3 | | | | |
| WC | Sanjin Sadovich | 1 | 3 | 4 | Karol Beck | 6 | 6 |
| | | | | 11 | Thomas Enqvist | 3 | 2 |
| | Nenad Zimonjić | 2 | 3 | 11 | Thomas Enqvist | 3 | 2 |
| 11 | Thomas Enqvist | 6 | 6 | | | | |

#### Fifth qualifier

| First round | First round | First round | First round | First round | Qualifying competition | Qualifying competition | Qualifying competition | Qualifying competition |
| 5 | Wayne Arthurs | 6$^2$ | 6 | 6$^5$ | | | | |
| | Ramón Delgado | 7$^7$ | 3 | 7$^7$ | | | | |
| | Ramón Delgado | 7$^7$ | 3 | 7$^7$ | | Ramón Delgado | 6 | 7$^7$ |
| | | | | | 14 | Peter Luczak | 2 | 6$^5$ |
| | Glenn Weiner | 4 | 7$^7$ | 3 | 14 | Peter Luczak | 2 | 6$^5$ |
| 14 | Peter Luczak | 6 | 6$^5$ | 6 | | | | |

#### Sixth qualifier

| First round | First round | First round | First round | First round | Qualifying competition | Qualifying competition | Qualifying competition | Qualifying competition |
| 6 | Todd Martin | 3 | 4 | | | | | |
| | Michaël Llodra | 6 | 6 | | | | | |
| | Michaël Llodra | 6 | 6 | | | Michaël Llodra | 7$^7$ | 6 |
| | | | | | WC | Matt Klinger | 6$^5$ | 3 |
| WC | Matt Klinger | 6 | 3 | 6 | WC | Matt Klinger | 6$^5$ | 3 |
| 12 | Ivo Heuberger | 4 | 6 | 3 | | | | |

#### Seventh qualifier

| First round | First round | First round | First round | Qualifying competition | Qualifying competition | Qualifying competition | Qualifying competition |
| 7 | Grégory Carraz | 6 | 6 | | | | |
| | Gastón Etlis | 4 | 4 | | | | |
| | Gastón Etlis | 4 | 4 | 7 | Grégory Carraz | 7 | 6 |
| | | | | 16 | Harel Levy | 5 | 2 |
| | Michael Joyce | 4 | 2 | 16 | Harel Levy | 5 | 2 |
| 16 | Harel Levy | 6 | 6 | | | | |

#### Eighth qualifier

| First round | First round | First round | First round | First round | Qualifying competition | Qualifying competition | Qualifying competition | Qualifying competition |
| 8 | Cyril Saulnier | 6 | 6 | | | | | |
| | Amir Hadad | 2 | 3 | | | | | |
| | Amir Hadad | 2 | 3 | | 8 | Cyril Saulnier | 6 | 6 |
| | | | | | 13 | Jiří Vaněk | 1 | 2 |
| WC | Dejan Cvetkovic | 7$^7$ | 5 | 1 | 13 | Jiří Vaněk | 1 | 2 |
| 13 | Jiří Vaněk | 6$^1$ | 7 | 6 | | | | |