# 2011 Western & Southern Open – Women's singles

Maria Sharapova defeated Jelena Janković in the final, 4–6, 7–6$^{(7–3)}$, 6–3 to win the women's singles tennis title at the 2011 Cincinnati Masters.
Kim Clijsters was the reigning champion, but withdrew due to an abdominal injury.

## Seeds

The top eight seeds received a bye into the second round.
* Caroline Wozniacki (second round)
* Vera Zvonareva (semifinals)
* Victoria Azarenka (withdrew due to a right hand injury)
* Maria Sharapova (champion)
* Li Na (third round)
* Petra Kvitová (third round)
* Francesca Schiavone (third round)
* Marion Bartoli (third round)
* Andrea Petkovic (semifinals)
* Samantha Stosur (quarterfinals)
* Agnieszka Radwańska (withdrew due to a right shoulder injury)
* Anastasia Pavlyuchenkova (first round)
* Jelena Janković (final)
* Svetlana Kuznetsova (third round)
* Ana Ivanovic (second round)
* Peng Shuai (quarterfinals, withdrew due to a left hip injury)
* Yanina Wickmayer (second round)

## Main 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 | Semifinals | Final | Final | Final | Final | Final |
| | Nadia Petrova | 5 | 1 | | | | | | | | | | |
| 9 | Andrea Petkovic | 7 | 6 | | | | | | | | | | |
| 9 | Andrea Petkovic | 7 | 6 | 9 | Andrea Petkovic | 6$^4$ | 1 | | | | | | |
| | | | | 13 | Jelena Janković | 7$^7$ | 6 | | | | | | |
| 16 | Peng Shuai | | | 13 | Jelena Janković | 7$^7$ | 6 | | | | | | |
| 13 | Jelena Janković | w/o | | | | | | | | | | | |
| 13 | Jelena Janković | w/o | | | | | | | 13 | Jelena Janković | 6 | 6$^3$ | 3 |
| | | | | | | | | | 4/WC | Maria Sharapova | 4 | 7$^7$ | 6 |
| 10 | Samantha Stosur | 3 | 2 | | | | | | | | | | | 4/WC | Maria Sharapova | 4 | 7$^7$ | 6 |
| 4/WC | Maria Sharapova | 6 | 6 | | | | | | | | | | |
| 4/WC | Maria Sharapova | 6 | 6 | 4/WC | Maria Sharapova | 2 | 6 | 6 | | | | | |
| | | | | 2 | Vera Zvonareva | 6 | 3 | 3 | | | | | |
| | Daniela Hantuchová | 3 | 6$^6$ | 2 | Vera Zvonareva | 6 | 3 | 3 | | | | | |
| 2 | Vera Zvonareva | 6 | 7$^8$ | | | | | | | | | | |

### Top half
#### Section 1

| First round | First round | First round | First round | First round | Second round | Second round | Second round | Second round | Third round | Third round | Third round | Third round | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals |
| | | | | | 1 | C Wozniacki | 4 | 5 | | | | | | | | |
| WC | C McHale | 7 | 4 | 6 | WC | C McHale | 6 | 7 | | | | | | | | |
| | T Pironkova | 5 | 6 | 1 | | | | | WC | C McHale | 3 | 3 | | | | |
| | R Vinci | 3 | 6 | 4 | | | | | | N Petrova | 6 | 6 | | | | |
| | N Petrova | 6 | 0 | 6 | | N Petrova | 6 | 7$^7$ | | | | | | | | |
| Q | A Glatch | 0 | 2 | | 15 | A Ivanovic | 3 | 6$^4$ | | | | | | | | |
| 15 | A Ivanovic | 6 | 6 | | | | | | | | | | | N Petrova | 5 | 1 |
| 9 | A Petkovic | 5 | 7$^7$ | 6 | | | | | | | | | 9 | A Petkovic | 7 | 6 |
| | J Gajdošová | 7 | 6$^5$ | 2 | 9 | A Petkovic | 6 | 6 | | | | | | | | |
| LL | S Arvidsson | 0 | 7$^7$ | 6 | LL | S Arvidsson | 2 | 4 | | | | | | | | |
| Q | M Niculescu | 6 | 6$^4$ | 3 | | | | | 9 | A Petkovic | 6 | 6 | | | | |
| | R Marino | 5 | 2 | | | | | | 6 | P Kvitová | 3 | 3 | | | | |
| Q | C Scheepers | 7 | 6 | | Q | C Scheepers | 6$^3$ | 3 | | | | | | | | |
| | | | | | 6 | P Kvitová | 7$^7$ | 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 |
| | | | | | LL | P Parmentier | 2 | 3 | | | | | | | | | |
| | S Lisicki | 4 | 6$^4$ | | | S Pe'er | 6 | 6 | | | | | | | | | |
| | S Pe'er | 6 | 7$^7$ | | | | | | | | S Pe'er | 3 | 2 | | | | |
| WC | S Stephens | 1 | 5 | | | | | | | 16 | S Peng | 6 | 6 | | | | |
| | S Errani | 6 | 7 | | | S Errani | 2 | 4 | | | | | | | | | |
| | G Dulko | 3 | 6 | 4 | 16 | S Peng | 6 | 6 | | | | | | | | | |
| 16 | S Peng | 6 | 4 | 6 | | | | | | | | | | | 16 | S Peng | |
| 13 | J Janković | 6 | 6 | | | | | | | | | | | | 13 | J Janković | w/o |
| | I Benešová | 0 | 3 | | 13 | J Janković | 4 | 6 | 6 | | | | | | | | |
| | J Görges | 2 | 6 | 4 | Q | J Zheng | 6 | 3 | 1 | | | | | | | | |
| Q | J Zheng | 6 | 1 | 6 | | | | | | 13 | J Janković | 6 | 5 | 6 | | | |
| Q | S Zhang | 6$^2$ | 3 | | | | | | | 7 | F Schiavone | 3 | 7 | 4 | | | |
| | M Kirilenko | 7$^7$ | 6 | | | M Kirilenko | 5 | 6 | 4 | | | | | | | | |
| | | | | | 7 | F Schiavone | 7 | 3 | 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 | Quarterfinals |
| | | | | | 5 | N Li | 6 | 6 | | | | | | | | | | |
| | L Šafářová | 6 | 6 | | | L Šafářová | 3 | 4 | | | | | | | | | | |
| | K Zakopalová | 2 | 2 | | | | | | | 5 | N Li | 4 | 6 | 4 | | | | |
| | L Hradecká | 3 | 6$^5$ | | | | | | | 10 | S Stosur | 6 | 3 | 6 | | | | |
| | S Williams | 6 | 7$^7$ | | | S Williams | | | | | | | | | | | | |
| Q | E Daniilidou | 3 | 1 | | 10 | S Stosur | w/o | | | | | | | | | | | |
| 10 | S Stosur | 6 | 6 | | | | | | | | | | | | 10 | S Stosur | 3 | 2 |
| 14 | S Kuznetsova | 6 | 6 | | | | | | | | | | | | 4/WC | M Sharapova | 6 | 6 |
| Q | J Craybas | 3 | 4 | | 14 | S Kuznetsova | 4 | 6 | 6 | | | | | | | | | |
| Q | P Cetkovská | 2 | 6 | 6 | Q | P Cetkovská | 6 | 3 | 4 | | | | | | | | | |
| | A Medina Garrigues | 6 | 2 | 2 | | | | | | 14 | S Kuznetsova | 2 | 3 | | | | | |
| Q | A Rodionova | 6 | 6 | | | | | | | 4/WC | M Sharapova | 6 | 6 | | | | | |
| WC | P Hercog | 0 | 0 | | Q | A Rodionova | 1 | 3 | | | | | | | | | | |
| | | | | | 4/WC | M Sharapova | 6 | 6 | | | | | | | | | | |

#### 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 | Quarterfinals |
| | | | | | 8 | M Bartoli | 6 | 6 | | | | | | | | | | |
| | A Morita | 2 | 6 | 2 | PR | A Bondarenko | 1 | 2 | | | | | | | | | | |
| PR | A Bondarenko | 6 | 4 | 6 | | | | | | 8 | M Bartoli | 3 | 7 | 3 | | | | |
| | D Hantuchová | 6 | 4 | | | | | | | | D Hantuchová | 6 | 5 | 6 | | | | |
| | L Domínguez Lino | 3 | 1$^r$ | | | D Hantuchová | 6 | 6 | | | | | | | | | | |
| | F Pennetta | 2 | 6 | 6 | | F Pennetta | 3 | 4 | | | | | | | | | | |
| 12 | A Pavlyuchenkova | 6 | 3 | 3 | | | | | | | | | | | | D Hantuchová | 3 | 6$^6$ |
| 17 | Y Wickmayer | 6 | 6 | | | | | | | | | | | | 2 | V Zvonareva | 6 | 7$^8$ |
| Q | B Jovanovski | 3 | 4 | | 17 | Y Wickmayer | 6 | 2 | 2 | | | | | | | | | |
| | E Vesnina | 6 | 6$^5$ | 0 | Q | P Martić | 3 | 6 | 6 | | | | | | | | | |
| Q | P Martić | 3 | 7$^7$ | 6 | | | | | | Q | P Martić | 2 | 2 | | | | | |
| LL | MJ Martínez Sánchez | 5 | 3 | | | | | | | 2 | V Zvonareva | 6 | 6 | | | | | |
| | E Makarova | 7 | 6 | | | E Makarova | 3 | 0 | | | | | | | | | | |
| | | | | | 2 | V Zvonareva | 6 | 6 | | | | | | | | | | |