| Singles | |
|---|---|
| 2004 Bank of the West Classic | |
| Champion |  Lindsay Davenport |
| Runner-up | Venus Williams |
| Final score | 7–6(7–4), 5–7, 7–6(7–4) |
| Draw | 28 |
| Seeds | 8 |
Kim Clijsters was the defending champion, but did not compete this year due to a recovery from a surgery.
Lindsay Davenport won the title, defeating Venus Williams 7–6(7–4), 5–7, 7–6(7–4) in the final.
The first four seeds received a bye into the second round.
Venus Williams (final) Lindsay Davenport (champion)
Patty Schnyder (quarterfinals)
Francesca Schiavone (quarterfinals)
Anna Smashnova-Pistolesi (quarterfinals) Amy Frazier (semifinals) Meghann Shaughnessy (first round)
María Vento-Kabchi (semifinals)| Semifinals | Final | ||||||||||||
| 1/PR | Venus Williams | 6 | 6 | ||||||||||
| 6 | Amy Frazier | 3 | 1 | ||||||||||
| 1/PR | Venus Williams | 64 | 7 | 64 | |||||||||
| 2 | Lindsay Davenport | 77 | 5 | 77 | |||||||||
| 8 | María Vento-Kabchi | 3 | 2 | ||||||||||
| 2 | Lindsay Davenport | 6 | 6 | ||||||||||
| First round | Second round | Quarterfinals | Semifinals | ||||||||||||||||||||||||
| 1/PR | V Williams | 6 | 6 | ||||||||||||||||||||||||
| WC | A Haynes | 2 | 4 | L Lee-Waters | 1 | 1 | |||||||||||||||||||||
| L Lee-Waters | 6 | 6 | 1/PR | V Williams | 6 | 6 | |||||||||||||||||||||
 A Jidkova | 2 | 1 | 5 | A Smashnova-Pistolesi | 0 | 3 | |||||||||||||||||||||
 A Parra Santonja | 6 | 6 | A Parra Santonja | 6 | 5 | 2 | |||||||||||||||||||||
| Q | J Jackson | 1 | 6 | 63 | 5 | A Smashnova-Pistolesi | 3 | 7 | 6 | ||||||||||||||||||
| 5 | A Smashnova-Pistolesi | 6 | 0 | 77 | 1/PR | V Williams | 6 | 6 | |||||||||||||||||||
| 6 | A Frazier | 3 | 1 | ||||||||||||||||||||||||
| 3 | P Schnyder | 6 | 6 | ||||||||||||||||||||||||
 N Pratt | 6 | 6 | N Pratt | 3 | 2 | ||||||||||||||||||||||
 J Janković | 4 | 3 | 3 | P Schnyder | 3 | 64 | |||||||||||||||||||||
| E Likhovtseva | 1 | 4 | 6 | A Frazier | 6 | 77 | |||||||||||||||||||||
 M Bartoli | 6 | 6 | M Bartoli | 3 | 60 | ||||||||||||||||||||||
| WC | A Liu | 5 | 6 | 3 | 6 | A Frazier | 6 | 77 | |||||||||||||||||||
| 6 | A Frazier | 7 | 4 | 6 | |||||||||||||||||||||||
| First round | Second round | Quarterfinals | Semifinals | ||||||||||||||||||||||||
| 8 | M Vento-Kabchi | 6 | 66 | 78 | |||||||||||||||||||||||
 E Daniilidou | 3 | 78 | 66 | 8 | M Vento-Kabchi | 6 | 6 | ||||||||||||||||||||
 I Benešová | 63 | 6 | 4 |  A Barna | 2 | 2 | |||||||||||||||||||||
| A Barna | 77 | 4 | 6 | 8 | M Vento-Kabchi | 6 | 6 | ||||||||||||||||||||
| Q | A Harkleroad | 5 | 6 | 1 | 4 | F Schiavone | 4 | 1 | |||||||||||||||||||
 J Kostanić | 7 | 4 | 6 | J Kostanić | 4 | 6 | 62 | ||||||||||||||||||||
| 4 | F Schiavone | 6 | 3 | 77 | |||||||||||||||||||||||
| 8 | M Vento-Kabchi | 3 | 2 | ||||||||||||||||||||||||
| 7 | M Shaughnessy | 3 | 1 | 2 | L Davenport | 6 | 6 | ||||||||||||||||||||
| Q | M Irvin | 6 | 6 | Q | M Irvin | 1 | 6 | 3 | |||||||||||||||||||
| LL | M Washington | 7 | 6 | LL | M Washington | 6 | 3 | 6 | |||||||||||||||||||
 C Schaul | 5 | 1 | LL | M Washington | 4 | 6 | 1 | ||||||||||||||||||||
 P Mandula | 6 | 2 | 3 | 2 | L Davenport | 6 | 3 | 6 | |||||||||||||||||||
| Q | Lioudmila Skavronskaia | 3 | 6 | 6 | Q | L Skavronskaia | 1 | 1 | |||||||||||||||||||
| 2 | L Davenport | 6 | 6 | ||||||||||||||||||||||||
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Lindsay Davenport was the defending champion but lost in the semifinals to Venus Williams.
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Martina Hingis was the defending champion but did not compete that year.
Lindsay Davenport was the defending champion and won in the final 7–5, 6–3 against Venus Williams.
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Lindsay Davenport was the defending champion, but retired in the second round against Anna-Lena Grönefeld due to a low back strain.
Lindsay Davenport was the defending champion and successfully defended her title, defeating Magdalena Maleeva 6–4, 6–1 in the final. It was the 1st title of the year 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.
Venus Williams was the defending champion, but did not compete this year.
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Venus Williams was the defending champion and successfully defended her title, by defeating Lindsay Davenport 7–5, 6–0 in the final to win her fourth title in a row. The final was a replay of the one played last year, in where Williams also won in two sets.
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