2003 Rogers AT&T Cup – Singles

Justine Henin-Hardenne defeated Lina Krasnoroutskaya in the final, 6–1, 6–0 to win the women's singles tennis title at the 2003 Canadian Open.

Amélie Mauresmo was the defending champion, but lost in the quarterfinals to Elena Dementieva.

Seeds
The top eight seeds receive a bye into the second round.


 * 1) 🇧🇪 Kim Clijsters (third round)
 * 2) 🇧🇪 Justine Henin-Hardenne (champion)
 * 3) 🇫🇷 Amélie Mauresmo (quarterfinals)
 * 4) 🇸🇰 Daniela Hantuchová (third round)
 * 5) 🇷🇺 Anastasia Myskina (third round)
 * 6) 🇧🇬 Magdalena Maleeva (second round)
 * 7)  Amanda Coetzer (third round)
 * 8)  Jelena Dokić (third round)
 * 9) 🇷🇺 Elena Dementieva (semifinals)
 * 10) 🇷🇺 Vera Zvonareva (quarterfinals)
 * 11) 🇮🇹 Silvia Farina Elia (first round)
 * 12) 🇷🇺 Elena Bovina (quarterfinals)
 * 13)  Eleni Daniilidou (first round)
 * 14) 🇷🇺 Nadia Petrova (third round)
 * 15) 🇫🇷 Nathalie Dechy (second round)
 * 16) 🇷🇺 Svetlana Kuznetsova (first round)