2009 Bank of the West Classic
The 2009 Bank of the West Classic was a tennis tournament played on outdoor hard courts. It was the 38th edition of the Bank of the West Classic, and was part of the WTA Premier tournaments of the 2009 WTA Tour. It took place at the Taube Tennis Center in Stanford, California, United States, from July 27 through August 2, 2009. It was the first women's event on the 2009 US Open Series.WTA Entrants
Players committed to participating in the singles event for 2009.
| Player | WTA Tour Rank* | Seeds |
 Serena Williams | 2 | 1 |
| Venus Williams | 3 | 2 |
 Elena Dementieva | 4 | 3 |
 Jelena Janković | 6 | 4 |
| Nadia Petrova | 10 | 5 |
 Dominika Cibulková | 12 | 6 |
 Agnieszka Radwańska | 14 | 7 |
 Marion Bartoli | 15 | 8 |
- Seedings are based on the rankings of July 20, 2009.
Other entrants
The following players received wildcards into the singles main draw
The following players received entry from the qualifying draw:
Singles
defeated Venus Williams, 6-2, 5-7, 6-4
- It was Bartoli's 2nd title of the year, and 5th of her career.
Doubles
/ Venus Williams defeated Yung-Jan Chan / Monica Niculescu, 6-4, 6-1
