# 2012 Bank of the West Classic – Singles

Serena Williams was the defending champion, and successfully defended her title, defeating lucky loser CoCo Vandeweghe in the final, 7–5, 6–3. It was the first all-American final on the WTA Tour since the 2009 WTA Tour Championships, and the first on American soil since Los Angeles in 2004.

## Seeds

The top four seeds received a bye into the second round.
* Serena Williams (champion)
* Marion Bartoli (quarterfinals)
* Dominika Cibulková (quarterfinals)
* Jelena Janković (second round)
* Yanina Wickmayer (semifinals)
* Chanelle Scheepers (quarterfinals)
* Petra Martić (withdrew)
* Marina Erakovic (second round)
* Sorana Cîrstea (semifinals)

## Draw
### Key

* Q = Qualifier
* WC = Wild card
* LL = Lucky loser
* Alt = Alternate
* SE = Special exempt
* PR = Protected ranking
* ITF = ITF entry
* JE = Junior exempt
* w/o = Walkover
* r = Retired
* d = Defaulted
* SR = Special ranking

### Finals

| Semifinals | Semifinals | Semifinals | Semifinals | Semifinals | Final | Final | Final | Final |
| 1 | Serena Williams | 6 | 6 | | | | | |
| 9 | Sorana Cîrstea | 1 | 2 | | | | | |
| 9 | Sorana Cîrstea | 1 | 2 | | 1 | Serena Williams | 7 | 6 |
| | | | | | LL | CoCo Vandeweghe | 5 | 3 |
| LL | CoCo Vandeweghe | 6 | 3 | 6 | LL | CoCo Vandeweghe | 5 | 3 |
| 5 | Yanina Wickmayer | 2 | 6 | 2 | | | | |

### Top half

| First round | First round | First round | First round | First round | Second round | Second round | Second round | Second round | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Semifinals | Semifinals | Semifinals | Semifinals |
| | | | | | 1 | S Williams | 6 | 6 | | | | | | | | | |
| WC | N Gibbs | 6 | 6 | | WC | N Gibbs | 2 | 1 | | | | | | | | | |
| Q | N Lertcheewakarn | 4 | 4 | | | | | | 1 | S Williams | 6 | 6 | | | | | |
| WC | M Larcher de Brito | 5 | 6 | 6 | | | | | 6 | C Scheepers | 4 | 0 | | | | | |
| | J Gajdošová | 7 | 2 | 3 | WC | M Larcher de Brito | 3 | 4 | | | | | | | | | |
| Q | G Min | 4 | 4 | | 6 | C Scheepers | 6 | 6 | | | | | | | | | |
| 6 | C Scheepers | 6 | 6 | | | | | | | | | | | 1 | S Williams | 6 | 6 |
| | | | | | | | | | | | | | | 9 | S Cîrstea | 1 | 2 |
| | | | | | 3 | D Cibulková | 6 | 6 | | | | | | | | | |
| Q | E Sema | 6 | 6 | | Q | E Sema | 1 | 3 | | | | | | | | | |
| LL | A Glatch | 2 | 3 | | | | | | 3 | D Cibulková | 7$^7$ | 2 | 0 | | | | |
| | A Morita | 2$^r$ | | | | | | | 9 | S Cîrstea | 6$^5$ | 6 | 6 | | | | |
| LL | S Zheng | 4 | | | LL | S Zheng | 3 | 3 | | | | | | | | | |
| | V King | 5 | 4 | | 9 | S Cîrstea | 6 | 6 | | | | | | | | | |
| 9 | S Cîrstea | 7 | 6 | | | | | | | | | | | | | | |

### Bottom half

| First round | First round | First round | First round | First round | Second round | Second round | Second round | Second round | Second round | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Semifinals | Semifinals | Semifinals | Semifinals | Semifinals |
| 8 | M Erakovic | 6 | 6 | | | | | | | | | | | | | | | |
| Q | J Juricová | 2 | 2 | | 8 | M Erakovic | 3 | 6 | 4 | | | | | | | | | |
| | E Daniilidou | 6 | 3 | 4 | | U Radwańska | 6 | 3 | 6 | | | | | | | | | |
| | U Radwańska | 3 | 6 | 6 | | | | | | | U Radwańska | 4 | 4 | | | | | |
| | M Czink | 4 | 1 | | | | | | | LL | C Vandeweghe | 6 | 6 | | | | | |
| LL | C Vandeweghe | 6 | 6 | | LL | C Vandeweghe | 6 | 6 | | | | | | | | | | |
| | | | | | 4 | J Janković | 4 | 2 | | | | | | | | | | |
| | | | | | | | | | | | | | | LL | C Vandeweghe | 6 | 3 | 6 |
| 5 | Y Wickmayer | 7 | 2 | 7 | | | | | | | | | | 5 | Y Wickmayer | 2 | 6 | 2 |
| | K-c Chang | 5 | 6 | 5 | 5 | Y Wickmayer | 5 | 6 | 6 | | | | | | | | | |
| | S Stephens | 6$^5$ | 6 | 1 | | H Watson | 7 | 1 | 4 | | | | | | | | | |
| | H Watson | 7$^7$ | 4 | 6 | | | | | | 5 | Y Wickmayer | 6 | 6 | | | | | |
| WC | M Burdette | 2 | 7 | 6 | | | | | | 2 | M Bartoli | 3 | 2 | | | | | |
| | A Keothavong | 6 | 5 | 4 | WC | M Burdette | 5 | 0 | | | | | | | | | | |
| | | | | | 2 | M Bartoli | 7 | 6 | | | | | | | | | | |

## Qualifying
### Seeds

* Sesil Karatantcheva (first round)
* CoCo Vandeweghe (qualifying competition, lucky loser)
* Erika Sema (qualified)
* Alexa Glatch (qualifying competition, lucky loser)
* Noppawan Lertcheewakarn (qualified)
* Chan Yung-jan (first round)
* Grace Min (qualified)
* Zheng Saisai (qualifying competition, lucky loser)

### Qualifiers

* Grace Min
* Noppawan Lertcheewakarn
* Erika Sema
* Jana Juricová

### Lucky losers

* Alexa Glatch
* CoCo Vandeweghe
* Zheng Saisai

### Draw
#### First qualifier

| First round | First round | First round | First round | Qualifying competition | Qualifying competition | Qualifying competition | Qualifying competition | Qualifying competition |
| 1 | Sesil Karatantcheva | 3 | 5 | | | | | |
| | Abigail Spears | 6 | 7 | | | | | |
| | Abigail Spears | 6 | 7 | | Abigail Spears | 7$^7$ | 2 | 4 |
| | | | | 7 | Grace Min | 6$^2$ | 6 | 6 |
| WC | Alessondra Parra | 2 | 0 | 7 | Grace Min | 6$^2$ | 6 | 6 |
| 7 | Grace Min | 6 | 6 | | | | | |

#### Second qualifier

| First round | First round | First round | First round | First round | Qualifying competition | Qualifying competition | Qualifying competition | Qualifying competition | Qualifying competition |
| 2 | CoCo Vandeweghe | 6 | 6 | | | | | | |
| WC | Simone Kalhorn | 2 | 2 | | | | | | |
| WC | Simone Kalhorn | 2 | 2 | | 2 | CoCo Vandeweghe | 6 | 2 | 5 |
| | | | | | 5 | Noppawan Lertcheewakarn | 2 | 6 | 7 |
| WC | Ellen Tsay | 6 | 4 | 2 | 5 | Noppawan Lertcheewakarn | 2 | 6 | 7 |
| 5 | Noppawan Lertcheewakarn | 3 | 6 | 6 | | | | | |

#### Third qualifier

| First round | First round | First round | First round | Qualifying competition | Qualifying competition | Qualifying competition | Qualifying competition |
| 3 | Erika Sema | 6 | 6 | | | | |
| WC | Kristie Ahn | 4 | 4 | | | | |
| WC | Kristie Ahn | 4 | 4 | 3 | Erika Sema | 6 | 6 |
| | | | | 8 | Zheng Saisai | 3 | 3 |
| | Vladimíra Uhlířová | 2 | 2 | 8 | Zheng Saisai | 3 | 3 |
| 8 | Zheng Saisai | 6 | 6 | | | | |

#### Fourth qualifier

| First round | First round | First round | First round | First round | Qualifying competition | Qualifying competition | Qualifying competition | Qualifying competition | Qualifying competition |
| 4 | Alexa Glatch | 6 | 1 | 7$^7$ | | | | | |
| | Raquel Kops-Jones | 1 | 6 | 6$^5$ | | | | | |
| | Raquel Kops-Jones | 1 | 6 | 6$^5$ | 4 | Alexa Glatch | 4 | 6 | 2 |
| | | | | | WC | Jana Juricová | 6 | 2 | 6 |
| WC | Jana Juricová | 3 | 6 | 6 | WC | Jana Juricová | 6 | 2 | 6 |
| 6 | Chan Yung-jan | 6 | 1 | 2 | | | | | |