# 2018 Western & Southern Open – Women's singles

Kiki Bertens defeated Simona Halep in the final, 2–6, 7–6$^{(8–6)}$, 6–2 to win the women's singles tennis title at the 2018 Cincinnati Masters. She saved a championship point en route to her first hard court and Premier 5-level title, and defeated the world No. 2 and No. 1 players, in the second round and final, respectively. Bertens became the first Dutchwoman to win the title.
Garbiñe Muguruza was the defending champion, but lost in the second round to Lesia Tsurenko.

## Seeds

The top eight seeds received a bye into the second round.
    01. Simona Halep (final)
    02. Caroline Wozniacki (second round, retired)
    03. Sloane Stephens (third round)
    04. Angelique Kerber (third round)
    05. Elina Svitolina (quarterfinals)
    06. Caroline Garcia (third round)
    07. Garbiñe Muguruza (second round)
    08. Petra Kvitová (semifinals)
    09. Karolína Plíšková (second round)
    10. Julia Görges (first round, retired)
    11. Jeļena Ostapenko (first round)
    12. Daria Kasatkina (first round)
    13. Madison Keys (quarterfinals)
    14. Venus Williams (withdrew)
    15. Elise Mertens (quarterfinals)
    16. Ashleigh Barty (third round)
    17. Naomi Osaka (first round)
Click on the seed number of a player to go to their draw section.

## 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 | Quarterfinals | Semifinals | Semifinals | Semifinals | Semifinals | Semifinals | Final | Final | Final | Final | Final |
| 1 | Simona Halep | 6 | 6 | | | | | | | | | | | |
| | Lesia Tsurenko | 4 | 1 | | | | | | | | | | | |
| | Lesia Tsurenko | 4 | 1 | | 1 | Simona Halep | 6 | 6 | | | | | | |
| | | | | | | Aryna Sabalenka | 3 | 4 | | | | | | |
| 13 | Madison Keys | 3 | 4 | | | Aryna Sabalenka | 3 | 4 | | | | | | |
| | Aryna Sabalenka | 6 | 6 | | | | | | | | | | | |
| | Aryna Sabalenka | 6 | 6 | | | | | | | 1 | Simona Halep | 6 | 6$^6$ | 2 |
| | | | | | | | | | | | Kiki Bertens | 2 | 7$^8$ | 6 |
| 8 | Petra Kvitová | 7 | 5 | 6 | | | | | | | | | | | Kiki Bertens | 2 | 7$^8$ | 6 |
| 15 | Elise Mertens | 5 | 7 | 3 | | | | | | | | | | |
| 15 | Elise Mertens | 5 | 7 | 3 | 8 | Petra Kvitová | 6 | 4 | 2 | | | | | |
| | | | | | | Kiki Bertens | 3 | 6 | 6 | | | | | |
| 5 | Elina Svitolina | 4 | 3 | | | Kiki Bertens | 3 | 6 | 6 | | | | | |
| | Kiki Bertens | 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 |
| | | | | | 1 | S Halep | 4 | 6 | 6 | | | | | | | | |
| | I-C Begu | 6 | 3 | 3 | Q | A Tomljanović | 6 | 3 | 3 | | | | | | | | |
| Q | A Tomljanović | 4 | 6 | 6 | | | | | | 1 | S Halep | 7 | 6 | | | | |
| Q | K Kanepi | 2 | 6 | 6 | | | | | | 16 | A Barty | 5 | 4 | | | | |
| Q | V Lepchenko | 6 | 3 | 1 | Q | K Kanepi | 5 | 3 | | | | | | | | | |
| WC | M Vondroušová | 3 | 5 | | 16 | A Barty | 7 | 6 | | | | | | | | | |
| 16 | A Barty | 6 | 7 | | | | | | | | | | | 1 | S Halep | 6 | 6 |
| 11 | J Ostapenko | 6 | 5 | 0 | | | | | | | | | | | L Tsurenko | 4 | 1 |
| Q | A Cornet | 1 | 7 | 6 | Q | A Cornet | 2 | 0 | | | | | | | | | |
| Q | A Bogdan | 3 | 2 | | | E Makarova | 6 | 6 | | | | | | | | | |
| | E Makarova | 6 | 6 | | | | | | | | E Makarova | 6$^5$ | 2 | | | | |
| | D Collins | 0 | 2 | | | | | | | | L Tsurenko | 7$^7$ | 6 | | | | |
| | L Tsurenko | 6 | 6 | | | L Tsurenko | 2 | 6 | 6 | | | | | | | | |
| | | | | | 7 | G Muguruza | 6 | 4 | 4 | | | | | | | | |

#### 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 |
| | | | | | 4 | A Kerber | 4 | 7 | 6 | | | | | | | | | |
| | A Pavlyuchenkova | 6 | 6 | | | A Pavlyuchenkova | 6 | 5 | 4 | | | | | | | | | |
| | A Krunić | 1 | 0 | | | | | | | 4 | A Kerber | 6 | 6$^3$ | 4 | | | | |
| | A Sevastova | 2 | 3 | | | | | | | 13 | M Keys | 2 | 7$^7$ | 6 | | | | |
| LL | C Giorgi | 6 | 6 | | LL | C Giorgi | 2 | 2 | | | | | | | | | | |
| WC | B Mattek-Sands | 6 | 6$^3$ | 4 | 13 | M Keys | 6 | 6 | | | | | | | | | | |
| 13 | M Keys | 3 | 7$^7$ | 6 | | | | | | | | | | | 13 | M Keys | 3 | 4 |
| 9 | Ka Plíšková | 6 | 6 | | | | | | | | | | | | | A Sabalenka | 6 | 6 |
| | A Radwańska | 3 | 3 | | 9 | Ka Plíšková | 6 | 3 | 5 | | | | | | | | | |
| | J Konta | 6 | 3 | 4 | | A Sabalenka | 2 | 6 | 7 | | | | | | | | | |
| | A Sabalenka | 4 | 6 | 6 | | | | | | | A Sabalenka | 6 | 3 | 7 | | | | |
| WC | V Azarenka | 6$^5$ | 6 | 6 | | | | | | 6 | C Garcia | 4 | 6 | 5 | | | | |
| | C Suárez Navarro | 7$^7$ | 2 | 4 | WC | V Azarenka | 4 | 5 | | | | | | | | | | |
| | | | | | 6 | C Garcia | 6 | 7 | | | | | | | | | | |

### 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 | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals |
| | | | | | 8 | P Kvitová | 6 | 2 | 6 | | | | | | | | | |
| | D Gavrilova | 1 | 2 | | PR | S Williams | 3 | 6 | 3 | | | | | | | | | |
| PR | S Williams | 6 | 6 | | | | | | | 8 | P Kvitová | 6 | 6 | | | | | |
| Q | A Sasnovich | 0 | 6 | 1 | | | | | | | K Mladenovic | 4 | 2 | | | | | |
| Q | V Kužmová | 6 | 4 | 6 | Q | V Kužmová | 3 | 0 | | | | | | | | | | |
| | K Mladenovic | 6 | 3 | | | K Mladenovic | 6 | 6 | | | | | | | | | | |
| 10 | J Görges | 4 | 2$^r$ | | | | | | | | | | | 8 | P Kvitová | 7 | 5 | 6 |
| 15 | E Mertens | 6 | 6 | | | | | | | | | | | 15 | E Mertens | 5 | 7 | 3 |
| | M Rybáriková | 4 | 2 | | 15 | E Mertens | 3 | 6 | 7$^7$ | | | | | | | | | |
| Q | R Peterson | 2 | 6 | 6 | Q | R Peterson | 6 | 2 | 6$^1$ | | | | | | | | | |
| | K Siniaková | 6 | 4 | 1 | | | | | | 15 | E Mertens | 7$^{10}$ | 6 | | | | | |
| Q | T Maria | 5 | 6 | 6 | | | | | | 3 | S Stephens | 6$^8$ | 2 | | | | | |
| Q | A Kiick | 7 | 3 | 3 | Q | T Maria | 3 | 2 | | | | | | | | | | |
| | | | | | 3 | S Stephens | 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 |
| | | | | | 5 | E Svitolina | 7$^7$ | 4 | 6 | | | | | | | | | |
| WC | S Kuznetsova | 6 | 2 | 7$^7$ | WC | S Kuznetsova | 6$^1$ | 6 | 4 | | | | | | | | | |
| Q | S Vögele | 4 | 6 | 6$^5$ | | | | | | 5 | E Svitolina | 6 | 6 | | | | | |
| | T Babos | 3 | 4 | | | | | | | WC | A Anisimova | 4 | 4 | | | | | |
| WC | A Anisimova | 6 | 6 | | WC | A Anisimova | 6 | 6 | | | | | | | | | | |
| Q | P Martić | 4 | 6 | 6 | Q | P Martić | 4 | 3 | | | | | | | | | | |
| 12 | D Kasatkina | 6 | 4 | 3 | | | | | | | | | | | 5 | E Svitolina | 4 | 3 |
| 17 | N Osaka | 3 | 6$^8$ | | | | | | | | | | | | | K Bertens | 6 | 6 |
| | M Sakkari | 6 | 7$^{10}$ | | | M Sakkari | 1 | 3 | | | | | | | | | | |
| | A Kontaveit | 6 | 6 | | | A Kontaveit | 6 | 6 | | | | | | | | | | |
| | B Strýcová | 3 | 0 | | | | | | | | A Kontaveit | 3 | 6 | 3 | | | | |
| | K Bertens | 6 | 6 | | | | | | | | K Bertens | 6 | 2 | 6 | | | | |
| | C Vandeweghe | 2 | 0 | | | K Bertens | 6 | 0 | | | | | | | | | | |
| | | | | | 2 | C Wozniacki | 4 | 0$^r$ | | | | | | | | | | |

## Qualifying
### Seeds

* Alizé Cornet (qualified)
* Aliaksandra Sasnovich (qualified)
* Donna Vekić (qualifying competition)
* Camila Giorgi (qualifying competition, lucky loser)
* Alison Van Uytvanck (first round, retired)
* Hsieh Su-wei (first round)
* Belinda Bencic (first round)
* Kirsten Flipkens (first round)
* Kaia Kanepi (qualified)
* Yulia Putintseva (qualifying competition)
* Petra Martić (qualified)
* Sorana Cîrstea (qualifying competition)
* Viktória Kužmová (qualified)
* Ajla Tomljanović (qualified)
* Magda Linette (first round)
* Zarina Diyas (qualifying competition)
* Samantha Stosur (first round)
* Vera Lapko (qualifying competition)
* Jennifer Brady (qualifying competition)
* Sofia Kenin (qualifying competition)
* Monica Niculescu (first round)
* Monica Puig (first round)
* Rebecca Peterson (qualified)
* Sachia Vickery (first round)

### Qualifiers

* Alizé Cornet
* Aliaksandra Sasnovich
* Ana Bogdan
* Viktória Kužmová
* Stefanie Vögele
* Tatjana Maria
* Varvara Lepchenko
* Allie Kiick
* Kaia Kanepi
* Rebecca Peterson
* Petra Martić
* Ajla Tomljanović

### Lucky loser

* Camila Giorgi

### Draw
#### First qualifier

| First round | First round | First round | First round | Qualifying competition | Qualifying competition | Qualifying competition | Qualifying competition |
| 1 | Alizé Cornet | 6 | 6 | | | | |
| | Nicole Gibbs | 2 | 1 | | | | |
| | Nicole Gibbs | 2 | 1 | 1 | Alizé Cornet | 6 | 6 |
| | | | | 20 | Sofia Kenin | 1 | 3 |
| WC | Francesca Di Lorenzo | 3 | 3 | 20 | Sofia Kenin | 1 | 3 |
| 20 | Sofia Kenin | 6 | 6 | | | | |

#### Second qualifier

| First round | First round | First round | First round | First round | Qualifying competition | Qualifying competition | Qualifying competition | Qualifying competition |
| 2 | Aliaksandra Sasnovich | 2 | 7 | 6 | | | | |
| | Alison Riske | 6 | 5 | 2 | | | | |
| | Alison Riske | 6 | 5 | 2 | 2 | Aliaksandra Sasnovich | 7$^7$ | 6 |
| | | | | | 18 | Vera Lapko | 6$^5$ | 2 |
| | Anna Blinkova | 3 | 5 | | 18 | Vera Lapko | 6$^5$ | 2 |
| 18 | Vera Lapko | 6 | 7 | | | | | |

#### Third qualifier

| First round | First round | First round | First round | Qualifying competition | Qualifying competition | Qualifying competition | Qualifying competition |
| 3 | Donna Vekić | 6 | 6 | | | | |
| | Andrea Petkovic | 3 | 3 | | | | |
| | Andrea Petkovic | 3 | 3 | 3 | Donna Vekić | 3 | 2 |
| | | | | | Ana Bogdan | 6 | 6 |
| | Ana Bogdan | 6 | 7$^{10}$ | | Ana Bogdan | 6 | 6 |
| 21 | Monica Niculescu | 2 | 6$^8$ | | | | |

#### Fourth qualifier

| First round | First round | First round | First round | Qualifying competition | Qualifying competition | Qualifying competition | Qualifying competition | Qualifying competition |
| 4 | Camila Giorgi | 6 | 6 | | | | | |
| | Lara Arruabarrena | 3 | 4 | | | | | |
| | Lara Arruabarrena | 3 | 4 | 4 | Camila Giorgi | 6 | 3 | 5 |
| | | | | 13 | Viktória Kužmová | 3 | 6 | 7 |
| WC | Caroline Dolehide | 4 | 4 | 13 | Viktória Kužmová | 3 | 6 | 7 |
| 13 | Viktória Kužmová | 6 | 6 | | | | | |

#### Fifth qualifier

| First round | First round | First round | First round | First round | Qualifying competition | Qualifying competition | Qualifying competition | Qualifying competition |
| 5 | Alison Van Uytvanck | 6 | 2 | 0$^r$ | | | | |
| WC | Jamie Loeb | 1 | 6 | 3 | | | | |
| WC | Jamie Loeb | 1 | 6 | 3 | WC | Jamie Loeb | 4 | 1 |
| | | | | | | Stefanie Vögele | 6 | 6 |
| | Stefanie Vögele | 6 | 6 | | | Stefanie Vögele | 6 | 6 |
| 22 | Monica Puig | 2 | 0 | | | | | |

#### Sixth qualifier

| First round | First round | First round | First round | Qualifying competition | Qualifying competition | Qualifying competition | Qualifying competition |
| 6 | Hsieh Su-wei | 5 | 3 | | | | |
| | Tatjana Maria | 7 | 6 | | | | |
| | Tatjana Maria | 7 | 6 | | Tatjana Maria | 6 | 6 |
| | | | | 19 | Jennifer Brady | 3 | 2 |
| | Dalila Jakupović | 6 | 0$^r$ | 19 | Jennifer Brady | 3 | 2 |
| 19 | Jennifer Brady | 2 | 4 | | | | |

#### Seventh qualifier

| First round | First round | First round | First round | First round | Qualifying competition | Qualifying competition | Qualifying competition | Qualifying competition |
| 7 | Belinda Bencic | 7 | 6$^3$ | 3 | | | | |
| | Christina McHale | 5 | 7$^7$ | 6 | | | | |
| | Christina McHale | 5 | 7$^7$ | 6 | Christina McHale | 3 | 6 | 2 |
| | | | | | Varvara Lepchenko | 6 | 2 | 6 |
| | Varvara Lepchenko | 4 | 6 | 6 | Varvara Lepchenko | 6 | 2 | 6 |
| 24 | Sachia Vickery | 6 | 3 | 4 | | | | |

#### Eighth qualifier

| First round | First round | First round | First round | Qualifying competition | Qualifying competition | Qualifying competition | Qualifying competition |
| 8 | Kirsten Flipkens | 3 | 3 | | | | |
| | Natalia Vikhlyantseva | 6 | 6 | | | | |
| | Natalia Vikhlyantseva | 6 | 6 | | Natalia Vikhlyantseva | 5 | 1 |
| | | | | WC | Allie Kiick | 7 | 6 |
| WC | Allie Kiick | 7$^7$ | 6 | WC | Allie Kiick | 7 | 6 |
| 17 | Samantha Stosur | 6$^4$ | 1 | | | | |

#### Ninth qualifier

| First round | First round | First round | First round | First round | Qualifying competition | Qualifying competition | Qualifying competition | Qualifying competition |
| 9 | Kaia Kanepi | 4 | 6 | 6 | | | | |
| WC | Sabine Lisicki | 6 | 4 | 3 | | | | |
| WC | Sabine Lisicki | 6 | 4 | 3 | 9 | Kaia Kanepi | 6 | 6 |
| | | | | | 16 | Zarina Diyas | 3 | 3 |
| | Evgeniya Rodina | 5 | 3 | | 16 | Zarina Diyas | 3 | 3 |
| 16 | Zarina Diyas | 7 | 6 | | | | | |

#### Tenth qualifier

| First round | First round | First round | First round | First round | Qualifying competition | Qualifying competition | Qualifying competition | Qualifying competition |
| 10 | Yulia Putintseva | 7 | 3 | 6 | | | | |
| | Johanna Larsson | 5 | 6 | 0 | | | | |
| | Johanna Larsson | 5 | 6 | 0 | 10 | Yulia Putintseva | 4 | 1 |
| | | | | | 23 | Rebecca Peterson | 6 | 6 |
| | Anna Karolína Schmiedlová | 4 | 2 | | 23 | Rebecca Peterson | 6 | 6 |
| 23 | Rebecca Peterson | 6 | 6 | | | | | |

#### Eleventh qualifier

| First round | First round | First round | First round | First round | Qualifying competition | Qualifying competition | Qualifying competition | Qualifying competition |
| 11 | Petra Martić | 7 | 6 | | | | | |
| WC | Lauren Davis | 5 | 2 | | | | | |
| WC | Lauren Davis | 5 | 2 | | 11 | Petra Martić | 6 | 6 |
| | | | | | | Bernarda Pera | 2 | 1 |
| | Bernarda Pera | 6 | 3 | 6 | | Bernarda Pera | 2 | 1 |
| 15 | Magda Linette | 4 | 6 | 3 | | | | |

#### Twelfth qualifier

| First round | First round | First round | First round | First round | Qualifying competition | Qualifying competition | Qualifying competition | Qualifying competition |
| 12 | Sorana Cîrstea | 2 | 6 | 6 | | | | |
| PR | Vania King | 6 | 2 | 3 | | | | |
| PR | Vania King | 6 | 2 | 3 | 12 | Sorana Cîrstea | 3 | 2 |
| | | | | | 14 | Ajla Tomljanović | 6 | 6 |
| | Kurumi Nara | 4 | 3 | | 14 | Ajla Tomljanović | 6 | 6 |
| 14 | Ajla Tomljanović | 6 | 6 | | | | | |