2004 Rogers AT&T Cup – Singles

Amélie Mauresmo defeated Elena Likhovtseva in the final, 6–1, 6–0 to win the women's singles tennis title at the 2004 Canadian Open.

Justine Henin-Hardenne was the reigning champion, but chose not to participate that year.

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


 * 1) 🇺🇸 Serena Williams (withdrew due to a left knee inflammation)
 * 2) 🇫🇷 Amélie Mauresmo (champion)
 * 3) 🇷🇺 Anastasia Myskina (semifinals)
 * 4) 🇷🇺 Elena Dementieva (second round)
 * 5) 🇺🇸 Jennifer Capriati (quarterfinals)
 * 6) 🇷🇺 Maria Sharapova (third round)
 * 7) 🇯🇵 Ai Sugiyama (third round)
 * 8) 🇷🇺 Nadia Petrova (second round)
 * 9) 🇦🇷 Paola Suárez (third round)
 * 10) 🇷🇺 Vera Zvonareva (semifinals)
 * 11) 🇮🇹 Francesca Schiavone (third round)
 * 12)  Karolina Šprem (quarterfinals)
 * 13) 🇧🇬 Magdalena Maleeva (quarterfinals)
 * 14) 🇷🇺 Elena Bovina (third round)
 * 15) 🇺🇸 Chanda Rubin (third round)
 * 16) 🇨🇴 Fabiola Zuluaga (second round)
 * 17) 🇫🇷 Mary Pierce (third round)