# 2003 Bank of the West Classic – Singles

Venus Williams was the defending champion, but did not compete this year.
Kim Clijsters won the title by defeating Jennifer Capriati 4–6, 6–4, 6–2 in the final.

## Seeds

The first five seeds received a bye into the second round.
* Serena Williams (withdrew due to a left knee pain)
* Kim Clijsters (champion)
* Jennifer Capriati (final)
* Daniela Hantuchová (second round)
* Jelena Dokic (quarterfinals)
* Meghann Shaughnessy (second round)
* Eleni Daniilidou (second round)
* Nadia Petrova (first round)
* Lisa Raymond (quarterfinals)

## 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 | Final | Final | Final | Final | Final |
| 3 | Jennifer Capriati | 6 | 6 | | | | | |
| Q | María Vento-Kabchi | 4 | 4 | | | | | |
| Q | María Vento-Kabchi | 4 | 4 | 3 | Jennifer Capriati | 6 | 4 | 2 |
| | | | | 2 | Kim Clijsters | 4 | 6 | 6 |
| | Francesca Schiavone | 3 | 2 | 2 | Kim Clijsters | 4 | 6 | 6 |
| 2 | Kim Clijsters | 6 | 6 | | | | | |

### Top 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 | Quarterfinals | Semifinals | Semifinals | Semifinals | Semifinals |
| | | | | | 3 | J Capriati | 6 | 4 | 6 | | | | | | | | | |
| | M Bartoli | 6 | 4 | 6 | | M Bartoli | 2 | 6 | 1 | | | | | | | | | |
| | L Granville | 4 | 6 | 3 | | | | | | 3 | J Capriati | 6 | 6$^5$ | 6 | | | | |
| | R Grande | 3 | 4 | | | | | | | 9 | L Raymond | 1 | 7$^7$ | 4 | | | | |
| Q | A Haynes | 6 | 6 | | Q | A Haynes | 4 | 2 | | | | | | | | | | |
| | Y-j Cho | 5 | 7 | 1 | 9 | L Raymond | 6 | 6 | | | | | | | | | | |
| 9 | L Raymond | 7 | 5 | 6 | | | | | | | | | | | 3 | J Capriati | 6 | 6 |
| | | | | | | | | | | | | | | | Q | M Vento-Kabchi | 4 | 4 |
| | | | | | 5 | J Dokic | 6 | 6 | | | | | | | | | | |
| | A Stevenson | 6$^5$ | 6 | 6 | | A Stevenson | 3 | 2 | | | | | | | | | | |
| Q | T Ashley | 7$^7$ | 3 | 1 | | | | | | 5 | J Dokic | 4 | 3 | | | | | |
| LL | A Jidkova | 6 | 6 | | | | | | | Q | M Vento-Kabchi | 6 | 6 | | | | | |
| | S Taylor | 1 | 4 | | LL | A Jidkova | 1 | 3 | | | | | | | | | | |
| Q | M Vento-Kabchi | 6 | 7$^7$ | | Q | M Vento-Kabchi | 6 | 6 | | | | | | | | | | |
| 8 | N Petrova | 1 | 6$^4$ | | | | | | | | | | | | | | | |

### 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 | Quarterfinals | Semifinals | Semifinals | Semifinals | Semifinals |
| 7 | E Daniilidou | 6 | 6 | | | | | | | | | | | | | | | |
| | T Pisnik | 1 | 2 | | 7 | E Daniilidou | 3 | 2 | | | | | | | | | | |
| | J Craybas | 3 | 1 | | | F Schiavone | 6 | 6 | | | | | | | | | | |
| | F Schiavone | 6 | 6 | | | | | | | | F Schiavone | 7$^7$ | 6 | | | | | |
| | C Black | 3 | 6 | 1 | | | | | | | A Frazier | 6$^5$ | 3 | | | | | |
| | A Frazier | 6 | 2 | 6 | | A Frazier | 6 | 6 | | | | | | | | | | |
| | | | | | 4 | D Hantuchová | 2 | 4 | | | | | | | | | | |
| | | | | | | | | | | | | | | | | F Schiavone | 3 | 2 |
| 6 | M Shaughnessy | 6 | 6 | | | | | | | | | | | | 2 | K Clijsters | 6 | 6 |
| WC | J Janković | 3 | 1 | | 6 | M Shaughnessy | 6 | 6$^4$ | 4 | | | | | | | | | |
| LL | J Vakulenko | 1 | 2 | | | MG Mikaelian | 3 | 7$^7$ | 6 | | | | | | | | | |
| | MG Mikaelian | 6 | 6 | | | | | | | | MG Mikaelian | 6 | 0 | 1 | | | | |
| Q | T Snyder | 6 | 3 | 2 | | | | | | 2 | K Clijsters | 4 | 6 | 6 | | | | |
| WC | A Liu | 2 | 6 | 6 | WC | A Liu | 1 | 1 | | | | | | | | | | |
| | | | | | 2 | K Clijsters | 6 | 6 | | | | | | | | | | |