| Singles | |
|---|---|
| 2003 China Open | |
| Champions |  Elena Dementieva |
| Runners-up |  Chanda Rubin |
| Score | 6–3, 7–6(8–6) |
| Seeds | 8 |
Anna Smashnova was the defending champion, but chose not to participate this year.
Top seed Elena Dementieva won the title, defeating Chanda Rubin in the final, 6–3, 7–6(8–6).
The top four seeds received a bye into the second round.
Elena Dementieva (champion) Chanda Rubin (final)
Ai Sugiyama (semifinals)
Conchita Martínez (second round)
Jelena Dokic (second round, retired)
Alicia Molik (quarterfinals)
Émilie Loit (first round)
Cara Black (first round)| Semifinals | Final | ||||||||||||
| 1 | Elena Dementieva | 6 | 3 | 6 | |||||||||
| 3 | Ai Sugiyama | 1 | 6 | 3 | |||||||||
| 1 | Elena Dementieva | 6 | 78 | ||||||||||
| 2 | Chanda Rubin | 3 | 66 | ||||||||||
| Akiko Morigami | 0 | 7 | 3 | ||||||||||
| 2 | Chanda Rubin | 6 | 5 | 6 | |||||||||
| First round | Second round | Quarterfinals | Semifinals | ||||||||||||||||||||||||
| 1 | E Dementieva | 6 | 77 | ||||||||||||||||||||||||
 A Widjaja | 7 | 2 | 2 |  P Mandula | 3 | 61 | |||||||||||||||||||||
| P Mandula | 5 | 6 | 6 | 1 | E Dementieva | 6 | 77 | ||||||||||||||||||||
| N Pratt | 4 | 3 | M Sharapova | 4 | 64 | ||||||||||||||||||||||
| M Sánchez Lorenzo | 6 | 6 | M Sánchez Lorenzo | 6 | 3 | 4 | |||||||||||||||||||||
| M Sharapova | 6 | 63 | 6 | M Sharapova | 4 | 6 | 6 | ||||||||||||||||||||
| É Loit | 3 | 77 | 3 | 1 | E Dementieva | 6 | 3 | 6 | |||||||||||||||||||
| 3 | A Sugiyama | 1 | 6 | 3 | |||||||||||||||||||||||
| 3 | A Sugiyama | 79 | 6 | ||||||||||||||||||||||||
| Q |  T Garbin | 5 | 3r | WC |  T Sun | 67 | 4 | ||||||||||||||||||||
| WC | T Sun | 7 | 2 | 3 | A Sugiyama | 6 | 79 | ||||||||||||||||||||
| D Safina | 6 | 7 | D Safina | 4 | 67 | ||||||||||||||||||||||
 E Gagliardi | 3 | 5 | D Safina | 6 | 6 | ||||||||||||||||||||||
| Q | J Janković | 66 | 4r | 5 | J Dokic | 1 | 4 | ||||||||||||||||||||
| 5 | J Dokic | 78 | 4 | ||||||||||||||||||||||||
| First round | Second round | Quarterfinals | Semifinals | ||||||||||||||||||||||||
| 6 | A Molik | 6 | 6 | ||||||||||||||||||||||||
| F Pennetta | 3 | 2 | 6 | A Molik | 6 | 6 | |||||||||||||||||||||
| LL | J Craybas | 3 | 78 | 2 | LL | J Craybas | 4 | 3 | |||||||||||||||||||
| WC | J Zheng | 6 | 66 | 0r | 6 | A Molik | 63 | 5 | |||||||||||||||||||
| A Morigami | 6 | 6 | A Morigami | 77 | 7 | ||||||||||||||||||||||
| Q |  M Suchá | 2 | 3 | A Morigami | 7 | 6 | |||||||||||||||||||||
| 4 | C Martínez | 5 | 0 | ||||||||||||||||||||||||
| A Morigami | 0 | 7 | 3 | ||||||||||||||||||||||||
| C Black | 1 | 4 | 2 | C Rubin | 6 | 5 | 6 | ||||||||||||||||||||
| A Harkleroad | 6 | 6 | A Harkleroad | 0 | 4 | ||||||||||||||||||||||
 Y-j Cho | 0 | 2 |  A Barna | 6 | 6 | ||||||||||||||||||||||
| A Barna | 6 | 6 | A Barna | 1 | 4 | ||||||||||||||||||||||
 B Schett | 6 | 6 | 2 | C Rubin | 6 | 6 | |||||||||||||||||||||
| Q |  R Neffa-de los Ríos | 3 | 1 | B Schett | 61 | 2 | |||||||||||||||||||||
| 2 | C Rubin | 77 | 6 | ||||||||||||||||||||||||
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.
Amélie Mauresmo defeated Jennifer Capriati in the final, 6–4, 6–1 to win the women's singles tennis title at the 2002 Canadian Open.
Serena Williams defeated Jennifer Capriati in the final, 6–1, 6–7(7–9), 6–3 to win the women's singles tennis title at the 2001 Canadian Open.
Justine Henin won in the final 6–2, 6–2 against Sandrine Testud.
Monica Seles was the reigning champion but did not compete that year.
Els Callens and Meghann Shaughnessy were the defending champions, but chose to play on separate teams for this year. Callens played alongside Chanda Rubin and were eliminated in the quarterfinals, while Shaughnessy teamed up with Magdalena Maleeva and lost in the second round.
Defending champion Lindsay Davenport defeated Magdalena Maleeva in the final, 6–4, 6–1 to win the singles tennis title at the 2004 Pan Pacific Open. It was her first title of the season, and the 39th of her career.
Kim Clijsters was the defending champion, but did not compete this year due to a recovery from a cyst surgery.
Elena Dementieva and Janette Husárová were the defending champions, but had different outcomes. Dementieva had to withdraw due to a left foot strain, while Husárová teamed up with Elena Likhovtseva and reached the semifinals.
Lindsay Davenport defeated Monica Seles in the final, 6–7(6–8), 6–1, 6–2 to win the singles tennis title at the 2003 Pan Pacific Open. It was her first title of the season, and the 38th of her career.
Defending champion Justine Henin-Hardenne defeated Kim Clijsters in the final, 6–4, 4–6, 7–5 to win the singles tennis title at the 2003 WTA German Open. It was her third title of the year, and the ninth of her career.
Lindsay Davenport was the defending champion, but lost against Chanda Rubin in the final, 5–7, 7–6(7–5), 6–3.
Venus Williams was the defending champion and successfully defended her title by defeating Jelena Dokic 6–2, 6–2 in the final.
Martina Hingis defeated Lindsay Davenport in the final, 6–4, 4–6, 7–5 to win the singles tennis title at the 2000 Swisscom Challenge.
Kim Clijsters was the defending champion, and successfully defended her title by defeating compatriot Justine Henin-Hardenne 5–7, 6–4, 6–2 in the final.
Kim Clijsters was the defending champion, but was forced to withdraw due to a left ankle injury.
Elena Dementieva was the defending champion, but did not compete this year.
Chanda Rubin was the defending champion, but was forced to withdraw due to a right shoulder tendonitis. However, she recovered in time to compete in the doubles tournament, losing in the first round.
Svetlana Kuznetsova was the defending champion, but chose not to participate in 2003.
Mary Pierce was the defending champion, but she did not compete this year due to injury.