# 2018 Citi Open – Women's singles

Ekaterina Makarova was the defending champion, but lost in the first round to Ana Bogdan.
Svetlana Kuznetsova won the title, beating Donna Vekić in the final, 4–6, 7–6$^{(9–7)}$, 6–2, despite being four match points down in the second set.

## Seeds

* Caroline Wozniacki (withdrew due to leg injury)
* Sloane Stephens (second round)
* Naomi Osaka (second round)
* Ekaterina Makarova (first round)
* Aleksandra Krunić (first round)
* Belinda Bencic (quarterfinals)
* Donna Vekić (final)
* Yulia Putintseva (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 |
| SE | Zheng Saisai | 5 | 3 | | | | | |
| 7 | Donna Vekić | 7 | 6 | | | | | |
| 7 | Donna Vekić | 7 | 6 | 7 | Donna Vekić | 6 | 6$^7$ | 2 |
| | | | | | Svetlana Kuznetsova | 4 | 7$^9$ | 6 |
| | Svetlana Kuznetsova | 6 | 6 | | Svetlana Kuznetsova | 4 | 7$^9$ | 6 |
| | Andrea Petkovic | 2 | 2 | | | | | |

### Top half

| 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 |
| LL | Y Bonaventure | 6 | 6 | | | | | | | | | | | | | |
| Q | A Kalinina | 3 | 3 | LL | Y Bonaventure | 4 | 4 | | | | | | | | | |
| WC | K Swan | 2 | 4 | SE | S Zheng | 6 | 6 | | | | | | | | | |
| SE | S Zheng | 6 | 6 | | | | | | SE | S Zheng | 6 | 6 | | | | |
| Q | A Kiick | 6 | 6 | | | | | | Q | A Kiick | 3 | 1 | | | | |
| | X Han | 2 | 3 | Q | A Kiick | 6 | 5 | 6 | | | | | | | | |
| | K Boulter | 6 | 6 | | K Boulter | 4 | 7 | 1 | | | | | | | | |
| 5 | A Krunić | 2 | 0 | | | | | | | | | | SE | S Zheng | 5 | 3 |
| 3 | N Osaka | 6 | 7$^7$ | | | | | | | | | | 7 | D Vekić | 7 | 6 |
| | B Pera | 2 | 6$^4$ | 3 | N Osaka | 2 | 6 | 3 | | | | | | | | |
| | M Linette | 6 | 6 | | M Linette | 6 | 3 | 6 | | | | | | | | |
| | O Rogowska | 4 | 1 | | | | | | | M Linette | 1 | 6$^0$ | | | | |
| LL | M Hibi | 1 | 6$^6$ | | | | | | 7 | D Vekić | 6 | 7$^7$ | | | | |
| | F Stollár | 6 | 7$^8$ | | F Stollár | 2 | 6 | 6$^{13}$ | | | | | | | | |
| | C Dolehide | 3 | 4 | 7 | D Vekić | 6 | 3 | 7$^{15}$ | | | | | | | | |
| 7 | D Vekić | 6 | 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 | Quarterfinals | Semifinals | Semifinals | Semifinals |
| 8 | Y Putintseva | 6 | 3 | 6 | | | | | | | | | | | | | |
| | T Maria | 3 | 6 | 4 | 8 | Y Putintseva | 7 | 6 | | | | | | | | | |
| | J Brady | 6 | 6 | | | J Brady | 5 | 2 | | | | | | | | | |
| | N Vikhlyantseva | 1 | 4 | | | | | | | 8 | Y Putintseva | 2 | 2 | | | | |
| | S Kuznetsova | 6 | 6 | | | | | | | | S Kuznetsova | 6 | 6 | | | | |
| | K Ahn | 2 | 1 | | | S Kuznetsova | 6 | 6 | | | | | | | | | |
| | A Bogdan | 7$^7$ | 6 | | | A Bogdan | 2 | 1 | | | | | | | | | |
| 4 | E Makarova | 6$^2$ | 3 | | | | | | | | | | | | S Kuznetsova | 6 | 6 |
| 6 | B Bencic | 7 | 6 | | | | | | | | | | | | A Petkovic | 2 | 2 |
| Q | H Dart | 5 | 2 | | 6 | B Bencic | w/o | | | | | | | | | | |
| | N Hibino | 7 | 6 | | | N Hibino | | | | | | | | | | | |
| Q | S Zhuk | 5 | 4 | | | | | | | 6 | B Bencic | 3 | 6 | 6$^8$ | | | |
| | J Loeb | 1 | 1 | | | | | | | | A Petkovic | 6 | 2 | 7$^{10}$ | | | |
| | A Petkovic | 6 | 6 | | | A Petkovic | 2 | 6 | 6 | | | | | | | | |
| WC | B Mattek-Sands | 5 | 4 | | 2 | S Stephens | 6 | 4 | 2 | | | | | | | | |
| 2 | S Stephens | 7 | 6 | | | | | | | | | | | | | | |

## Qualifying
### Seeds

* Ysaline Bonaventure (qualifying competition, lucky loser)
* Anhelina Kalinina (qualified)
* Sofya Zhuk (qualified)
* Harriet Dart (qualified)
* Francesca Di Lorenzo (first round)
* Mayo Hibi (qualifying competition, lucky loser)
* Allie Kiick (qualified)
* Lauren Davis (first round)

### Qualifiers

* Allie Kiick
* Anhelina Kalinina
* Sofya Zhuk
* Harriet Dart

### Lucky losers

* Mayo Hibi
* Ysaline Bonaventure

### Draw
#### First qualifier

| First round | First round | First round | First round | Qualifying competition | Qualifying competition | Qualifying competition | Qualifying competition |
| 1 | Ysaline Bonaventure | 6 | 7 | | | | |
| | Sophie Chang | 4 | 5 | | | | |
| | Sophie Chang | 4 | 5 | 1 | Ysaline Bonaventure | 1 | 0 |
| | | | | 7 | Allie Kiick | 6 | 6 |
| | Nika Kukharchuk | 2 | 0 | 7 | Allie Kiick | 6 | 6 |
| 7 | Allie Kiick | 6 | 6 | | | | |

#### Second qualifier

| First round | First round | First round | First round | Qualifying competition | Qualifying competition | Qualifying competition | Qualifying competition |
| 2 | Anhelina Kalinina | 6 | 6 | | | | |
| | Sesil Karatantcheva | 4 | 1 | | | | |
| | Sesil Karatantcheva | 4 | 1 | 2 | Anhelina Kalinina | 6 | 6 |
| | | | | | Louisa Chirico | 3 | 4 |
| | Louisa Chirico | 6 | 7$^7$ | | Louisa Chirico | 3 | 4 |
| 8 | Lauren Davis | 1 | 6$^2$ | | | | |

#### Third qualifier

| First round | First round | First round | First round | Qualifying competition | Qualifying competition | Qualifying competition | Qualifying competition |
| 3 | Sofya Zhuk | 6 | 6 | | | | |
| | Deniz Khazaniuk | 4 | 3 | | | | |
| | Deniz Khazaniuk | 4 | 3 | 3 | Sofya Zhuk | 6 | 7$^7$ |
| | | | | 6 | Mayo Hibi | 3 | 6$^3$ |
| WC | Natasha Subhash | 0 | 1 | 6 | Mayo Hibi | 3 | 6$^3$ |
| 6 | Mayo Hibi | 6 | 6 | | | | |

#### Fourth qualifier

| First round | First round | First round | First round | First round | Qualifying competition | Qualifying competition | Qualifying competition | Qualifying competition |
| 4 | Harriet Dart | 6 | 6 | | | | | |
| | Shuko Aoyama | 1 | 0 | | | | | |
| | Shuko Aoyama | 1 | 0 | | 4 | Harriet Dart | 6 | 6 |
| | | | | | Alt | Alexa Guarachi | 2 | 2 |
| Alt | Alexa Guarachi | 2 | 7 | 7 | Alt | Alexa Guarachi | 2 | 2 |
| 5 | Francesca Di Lorenzo | 6 | 5 | 5 | | | | |