# 2005 Acura Classic – Singles

Mary Pierce defeated Ai Sugiyama in the final, 6–0, 6–3 to win the singles tennis title at the 2005 Southern California Open.
Lindsay Davenport was the reigning champion, but withdrew due to a lower-back strain.

## Seeds

The top eight seeds received a bye into the second round.
* Lindsay Davenport (withdrew due to a lower-back strain)
* Svetlana Kuznetsova (third round)
* Elena Dementieva (second round)
* Nadia Petrova (second round)
* Patty Schnyder (quarterfinals)
* Mary Pierce (champion)
* Kim Clijsters (quarterfinals)
* Vera Zvonareva (second round)
* Elena Likhovtseva (third round)
* Nathalie Dechy (third round)
* Jelena Janković (third round)
* Tatiana Golovin (first round)
* Shinobu Asagoe (first round)
* Daniela Hantuchová (second round)
* Flavia Pennetta (second round)
* Dinara Safina (third round)
* Francesca Schiavone (third round)

## 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

| Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Semifinals | Semifinals | Semifinals | Semifinals | Final | Final | Final | Final |
| | Peng Shuai | 6 | 6 | | | | | | | | |
| 7 | Kim Clijsters | 4 | 4 | | | | | | | | |
| 7 | Kim Clijsters | 4 | 4 | | Peng Shuai | 2 | 2 | | | | |
| | | | | 6 | Mary Pierce | 6 | 6 | | | | |
| 5 | Patty Schnyder | 4 | 3 | 6 | Mary Pierce | 6 | 6 | | | | |
| 6 | Mary Pierce | 6 | 6 | | | | | | | | |
| 6 | Mary Pierce | 6 | 6 | | | | | 6 | Mary Pierce | 6 | 6 |
| | | | | | | | | | Ai Sugiyama | 0 | 3 |
| | Anna Chakvetadze | 3 | 4 | | | | | | | | | Ai Sugiyama | 0 | 3 |
| | Akiko Morigami | 6 | 6 | | | | | | | | |
| | Akiko Morigami | 6 | 6 | | Akiko Morigami | 4 | 3$^r$ | | | | |
| | | | | | Ai Sugiyama | 6 | 4 | | | | |
| | Sesil Karatantcheva | 1 | 2 | | Ai Sugiyama | 6 | 4 | | | | |
| | Ai Sugiyama | 6 | 6 | | | | | | | | |

### Top half
#### Section 1

| First round | First round | First round | First round | First round | Second round | Second round | Second round | Second round | Second round | Third round | Third round | Third round | Third round | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals |
| | | | | | 3 | E Dementieva | 5 | 4 | | | | | | | | | |
| | S Peng | 7 | 6 | | | S Peng | 7 | 6 | | | | | | | | | |
| Q | ME Salerni | 5 | 1 | | | | | | | | S Peng | 7$^7$ | 6 | | | | |
| Q | A Nakamura | 2 | 2 | | | | | | | 16 | D Safina | 6$^2$ | 0 | | | | |
| Q | A Jidkova | 6 | 6 | | Q | A Jidkova | 6 | 1 | 0 | | | | | | | | |
| | C Martínez | 6$^{11}$ | 4 | | 16 | D Safina | 0 | 6 | 6 | | | | | | | | |
| 16 | D Safina | 7$^{13}$ | 6 | | | | | | | | | | | | S Peng | 6 | 6 |
| 11 | J Janković | 7 | 6 | | | | | | | | | | | 7 | K Clijsters | 4 | 4 |
| | A Frazier | 5 | 0 | | 11 | J Janković | 6 | 6 | | | | | | | | | |
| | M Vento-Kabchi | 4 | 5 | | Q | H Šromová | 3 | 2 | | | | | | | | | |
| Q | H Šromová | 6 | 7 | | | | | | | 11 | J Janković | 1 | 3 | | | | |
| | L Granville | 6 | 0 | 6$^9$ | | | | | | 7 | K Clijsters | 6 | 6 | | | | |
| | M Domachowska | 3 | 6 | 7$^{11}$ | | M Domachowska | 3 | 1 | | | | | | | | | |
| | | | | | 7 | K Clijsters | 6 | 6 | | | | | | | | | |

#### Section 2

| First round | First round | First round | First round | First round | Second round | Second round | Second round | Second round | Second round | Third round | Third round | Third round | Third round | Third round | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals |
| | | | | | 5 | P Schnyder | 6 | 6$^2$ | 6 | | | | | | | | | |
| | K Peschke | 0 | 6 | 7$^7$ | | K Peschke | 4 | 7$^7$ | 1 | | | | | | | | | |
| WC | J Craybas | 6 | 1 | 6$^2$ | | | | | | 5 | P Schnyder | 6$^1$ | 6 | 6 | | | | |
| | S Stosur | 3 | 2 | | | | | | | 17 | F Schiavone | 7$^7$ | 1 | 4 | | | | |
| Q | A Rodionova | 6 | 6 | | Q | A Rodionova | 2 | 2 | | | | | | | | | | |
| WC | A Spears | 3 | 2 | | 17 | F Schiavone | 6 | 6 | | | | | | | | | | |
| 17 | F Schiavone | 6 | 6 | | | | | | | | | | | | 5 | P Schnyder | 4 | 3 |
| 10 | N Dechy | 6 | 6 | | | | | | | | | | | | 6 | M Pierce | 6 | 6 |
| | K Brandi | 2 | 2 | | 10 | N Dechy | 4 | 7 | 7$^7$ | | | | | | | | | |
| | G Dulko | 7$^7$ | 1 | 6 | | G Dulko | 6 | 5 | 6$^3$ | | | | | | | | | |
| Q | S Obata | 6$^3$ | 6 | 3 | | | | | | 10 | N Dechy | 5 | 3 | | | | | |
| | A-L Grönefeld | 7$^7$ | 6 | | | | | | | 6 | M Pierce | 7 | 6 | | | | | |
| WC | E Daniilidou | 6$^5$ | 4 | | | A-L Grönefeld | 1 | 1 | | | | | | | | | | |
| | | | | | 6 | M Pierce | 6 | 6 | | | | | | | | | | |

### Bottom half
#### Section 3

| First round | First round | First round | First round | First round | Second round | Second round | Second round | Second round | Second round | Third round | Third round | Third round | Third round | Third round | Quarterfinals | Quarterfinals | Quarterfinals |
| | | | | | 9 | E Likhovtseva | 0 | 6 | 6 | | | | | | | | |
| | S Pe'er | 2 | 6 | 6 | | S Pe'er | 6 | 2 | 4 | | | | | | | | |
| | D Randriantefy | 6 | 3 | 4 | | | | | | 9 | E Likhovtseva | 3 | 1 | | | | |
| | F Zuluaga | 2 | 6 | 5 | | | | | | | A Chakvetadze | 6 | 6 | | | | |
| | I Benešová | 6 | 3 | 7 | | I Benešová | 4 | 3 | | | | | | | | | |
| | A Chakvetadze | 6 | 6 | | | A Chakvetadze | 6 | 6 | | | | | | | | | |
| 12 | T Golovin | 4 | 4 | | | | | | | | | | | | A Chakvetadze | 3 | 4 |
| 15 | F Pennetta | 6 | 6 | | | | | | | | | | | | A Morigami | 6 | 6 |
| LL | M Irvin | 2 | 2 | | 15 | F Pennetta | 1 | 5 | | | | | | | | | |
| | A Morigami | 6 | 6 | | | A Morigami | 6 | 7 | | | | | | | | | |
| | M Matevžič | 1 | 0 | | | | | | | | A Morigami | 6 | 4 | 6 | | | |
| Q | S Mirza | 6 | 6 | | | | | | | Q | S Mirza | 2 | 6 | 4 | | | |
| Q | T Garbin | 2 | 2 | | Q | S Mirza | 6 | 6 | | | | | | | | | |
| | | | | | 4 | N Petrova | 2 | 1 | | | | | | | | | |

#### Section 4

| First round | First round | First round | First round | First round | Second round | Second round | Second round | Second round | Second round | Third round | Third round | Third round | Third round | Third round | Quarterfinals | Quarterfinals | Quarterfinals |
| | | | | | 8 | V Zvonareva | 4 | 6 | 4 | | | | | | | | |
| | K Šprem | 6 | 6$^1$ | 1 | | M Washington | 6 | 4 | 6 | | | | | | | | |
| | M Washington | 2 | 7$^7$ | 6 | | | | | | | M Washington | 1 | 2 | | | | |
| | M Bartoli | 6 | 0 | 3 | | | | | | | S Karatantcheva | 6 | 6 | | | | |
| | L Raymond | 1 | 6 | 6 | | L Raymond | 6$^6$ | 4 | | | | | | | | | |
| | S Karatantcheva | 6 | 0 | 7 | | S Karatantcheva | 7$^8$ | 6 | | | | | | | | | |
| 13 | S Asagoe | 1 | 6 | 5 | | | | | | | | | | | S Karatantcheva | 1 | 2 |
| 14 | D Hantuchová | 7$^7$ | 6 | | | | | | | | | | | | A Sugiyama | 6 | 6 |
| | M Kirilenko | 6$^5$ | 1 | | 14 | D Hantuchová | 5 | 6 | 2 | | | | | | | | |
| | A Sugiyama | 3 | | | | A Sugiyama | 7 | 4 | 6 | | | | | | | | |
| | M Shaughnessy | 0$^r$ | | | | | | | | | A Sugiyama | 2 | 6 | 6 | | | |
| | E Linetskaya | 6$^5$ | 7 | 1 | | | | | | 2 | S Kuznetsova | 6 | 4 | 3 | | | |
| | K Koukalová | 7$^7$ | 5 | 6 | | K Koukalová | 5 | 3 | | | | | | | | | |
| | | | | | 2 | S Kuznetsova | 7 | 6 | | | | | | | | | |