# 2018 Sydney International – Women's singles

Johanna Konta was the defending champion, but lost in the first round to Agnieszka Radwańska in a rematch of the previous year's final.
Angelique Kerber won the title, defeating Ashleigh Barty in the final, 6–4, 6–4. Kerber won the title despite being two match points down in the second set in her first-round match against Lucie Šafářová.

## Seeds

The top two seeds received a bye into the second round.
* Garbiñe Muguruza (quarterfinals, withdrew due to right leg injury)
* Venus Williams (second round)
* Jeļena Ostapenko (first round)
* Johanna Konta (first round)
* Kristina Mladenovic (first round, retired)
* Sloane Stephens (first round)
* Julia Görges (withdrew)
* Anastasija Sevastova (first round)

## Draw
### Finals

| Semifinals | Semifinals | Semifinals | Semifinals | Semifinals | Final | Final | Final |
| | Daria Gavrilova | 6 | 4 | 2 | | | |
| | Ashleigh Barty | 3 | 6 | 6 | | | |
| | Ashleigh Barty | 3 | 6 | 6 | Ashleigh Barty | 4 | 4 |
| | | | | | Angelique Kerber | 6 | 6 |
| Q | Camila Giorgi | 2 | 3 | | Angelique Kerber | 6 | 6 |
| | Angelique Kerber | 6 | 6 | | | | |

### Top half

| First round | First round | First round | First round | First round | Second round | Second round | Second round | Second round | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Semifinals | Semifinals | Semifinals | Semifinals |
| | | | | | 1/WC | G Muguruza | 6 | 7$^8$ | | | | | | | | |
| Q | K Ahn | 2 | 4 | | | K Bertens | 3 | 6$^6$ | | | | | | | | |
| | K Bertens | 6 | 6 | | | | | | 1/WC | G Muguruza | | | | | | |
| | D Gavrilova | 6 | 1 | 7 | | | | | | D Gavrilova | w/o | | | | | |
| WC | O Rogowska | 4 | 6 | 5 | | D Gavrilova | 6 | 6 | | | | | | | | |
| WC | S Stosur | 4 | 7 | 6 | WC | S Stosur | 4 | 2 | | | | | | | | |
| LL | C Witthöft | 6 | 5 | 3 | | | | | | | | | D Gavrilova | 6 | 4 | 2 |
| 3 | J Ostapenko | 6$^3$ | 1 | | | | | | | | | | A Barty | 3 | 6 | 6 |
| | E Makarova | 7$^7$ | 6 | | | E Makarova | 4 | 1 | | | | | | | | |
| | D Kasatkina | 5 | 6 | 4 | | B Strýcová | 6 | 6 | | | | | | | | |
| | B Strýcová | 7 | 1 | 6 | | | | | | B Strýcová | 3 | 2 | | | | |
| | A Barty | 6 | 6 | | | | | | | A Barty | 6 | 6 | | | | |
| Q | V Cepede Royg | 3 | 4 | | | A Barty | 7$^7$ | 6 | | | | | | | | |
| WC | E Perez | 6 | 4 | | WC | E Perez | 6$^4$ | 1 | | | | | | | | |
| 5 | K Mladenovic | 4 | 2$^r$ | | | | | | | | | | | | | |

### 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 | Semifinals | Semifinals | Semifinals | Semifinals |
| 6 | S Stephens | 3 | 0 | | | | | | | | | | | | | | |
| Q | C Giorgi | 6 | 6 | | Q | C Giorgi | 7$^9$ | 6 | | | | | | | | | |
| | M Lučić-Baroni | 1 | 0$^r$ | | | P Kvitová | 6$^7$ | 2 | | | | | | | | | |
| | P Kvitová | 6 | 0 | | | | | | | Q | C Giorgi | 6 | 6 | | | | |
| Q | C Bellis | 7$^7$ | 6 | | | | | | | | A Radwańska | 1 | 2 | | | | |
| | M Rybáriková | 6$^2$ | 0 | | Q | C Bellis | 6$^4$ | 0 | | | | | | | | | |
| | A Radwańska | 6 | 7 | | | A Radwańska | 7$^7$ | 6 | | | | | | | | | |
| 4 | J Konta | 3 | 5 | | | | | | | | | | | Q | C Giorgi | 2 | 3 |
| 8 | A Sevastova | 3 | 1 | | | | | | | | | | | | A Kerber | 6 | 6 |
| | D Cibulková | 6 | 6 | | | D Cibulková | 6 | 6 | | | | | | | | | |
| | E Vesnina | 6 | 6 | | | E Vesnina | 4 | 4 | | | | | | | | | |
| LL | L Arruabarrena | 2 | 2 | | | | | | | | D Cibulková | 3 | 1 | | | | |
| | L Šafářová | 7$^7$ | 6$^8$ | 2 | | | | | | | A Kerber | 6 | 6 | | | | |
| | A Kerber | 6$^3$ | 7$^{10}$ | 6 | | A Kerber | 5 | 6 | 6 | | | | | | | | |
| | | | | | 2 | V Williams | 7 | 3 | 1 | | | | | | | | |

## Qualifying
### Seeds

* Ekaterina Makarova (moved to main draw)
* Anett Kontaveit (first round, retired)
* Carla Suárez Navarro (first round)
* Lauren Davis (first round)
* Carina Witthöft (qualifying competition, lucky loser)
* Maria Sakkari (first round)
* Monica Puig (qualifying competition)
* Catherine Bellis (qualified)

### Qualifiers

* Catherine Bellis
* Camila Giorgi
* Kristie Ahn
* Verónica Cepede Royg

### Lucky losers

* Lara Arruabarrena
* Carina Witthöft

### Qualifying draw
#### First qualifier

| First round | First round | First round | First round | First round | Second round | Second round | Second round | Second round | Second round | Qualifying competition | Qualifying competition | Qualifying competition | Qualifying competition | Qualifying competition |
| Alt | Abigail Spears | 2 | 6 | 3 | | | | | | | | | | |
| | Gabriela Dabrowski | 6 | 3 | 6 | | | | | | | | | | |
| | Gabriela Dabrowski | 6 | 3 | 6 | | Gabriela Dabrowski | 2 | 7 | 4 | | | | | |
| | | | | | | Ekaterina Alexandrova | 6 | 5 | 6 | | | | | |
| | Alicja Rosolska | 0 | 0 | | | Ekaterina Alexandrova | 6 | 5 | 6 | | | | | |
| | Ekaterina Alexandrova | 6 | 6 | | | | | | | | | | | |
| | Ekaterina Alexandrova | 6 | 6 | | | | | | | | Ekaterina Alexandrova | 6 | 3 | 1 |
| | | | | | | | | | | 8 | Catherine Bellis | 3 | 6 | 6 |
| | Kristína Kučová | 6 | 6 | | | | | | | | | | | | 8 | Catherine Bellis | 3 | 6 | 6 |
| | Yang Zhaoxuan | 1 | 2 | | | | | | | | | | | |
| | Yang Zhaoxuan | 1 | 2 | | | Kristína Kučová | 5 | 2 | | | | | | |
| | | | | | 8 | Catherine Bellis | 7 | 6 | | | | | | |
| | Jennifer Brady | 6$^2$ | 5 | | 8 | Catherine Bellis | 7 | 6 | | | | | | |
| 8 | Catherine Bellis | 7$^7$ | 7 | | | | | | | | | | | |

#### Second qualifier

| First round | First round | First round | First round | First round | Second round | Second round | Second round | Second round | Qualifying competition | Qualifying competition | Qualifying competition | Qualifying competition |
| 2 | Anett Kontaveit | 5 | 6 | 0$^r$ | | | | | | | | |
| | Shuko Aoyama | 7 | 4 | 3 | | | | | | | | |
| | Shuko Aoyama | 7 | 4 | 3 | | Shuko Aoyama | 2 | 6$^5$ | | | | |
| | | | | | | Camila Giorgi | 6 | 7$^7$ | | | | |
| | Camila Giorgi | 7 | 6 | | | Camila Giorgi | 6 | 7$^7$ | | | | |
| WC | Olivia Tjandramulia | 5 | 2 | | | | | | | | | |
| WC | Olivia Tjandramulia | 5 | 2 | | | | | | | Camila Giorgi | 6 | 6 |
| | | | | | | | | | 5 | Carina Witthöft | 4 | 1 |
| WC | Belinda Woolcock | 5 | 7 | 6 | | | | | | | | | 5 | Carina Witthöft | 4 | 1 |
| | Xu Yifan | 7 | 5 | 3 | | | | | | | | |
| | Xu Yifan | 7 | 5 | 3 | WC | Belinda Woolcock | 1 | 4 | | | | |
| | | | | | 5 | Carina Witthöft | 6 | 6 | | | | |
| | Anastasia Rodionova | 1 | 4 | | 5 | Carina Witthöft | 6 | 6 | | | | |
| 5 | Carina Witthöft | 6 | 6 | | | | | | | | | |

#### Third qualifier

| First round | First round | First round | First round | Second round | Second round | Second round | Second round | Second round | Qualifying competition | Qualifying competition | Qualifying competition | Qualifying competition |
| 3 | Carla Suárez Navarro | 1 | 4 | | | | | | | | | |
| | Kristie Ahn | 6 | 6 | | | | | | | | | |
| | Kristie Ahn | 6 | 6 | | Kristie Ahn | 6 | 6 | | | | | |
| | | | | | Johanna Larsson | 1 | 2 | | | | | |
| WC | Tammi Patterson | 3 | 6$^2$ | | Johanna Larsson | 1 | 2 | | | | | |
| | Johanna Larsson | 6 | 7$^7$ | | | | | | | | | |
| | Johanna Larsson | 6 | 7$^7$ | | | | | | | Kristie Ahn | 6 | 6 |
| | | | | | | | | | 7 | Monica Puig | 4 | 1 |
| | Duan Yingying | 6 | 6 | | | | | | | | | | 7 | Monica Puig | 4 | 1 |
| | Isabelle Wallace | 2 | 2 | | | | | | | | | |
| | Isabelle Wallace | 2 | 2 | | Duan Yingying | 6 | 4 | 5 | | | | |
| | | | | 7 | Monica Puig | 3 | 6 | 7 | | | | |
| | Alizé Lim | 2 | 2 | 7 | Monica Puig | 3 | 6 | 7 | | | | |
| 7 | Monica Puig | 6 | 6 | | | | | | | | | |

#### Fourth qualifier

| First round | First round | First round | First round | First round | Second round | Second round | Second round | Second round | Second round | Qualifying competition | Qualifying competition | Qualifying competition |
| 4 | Lauren Davis | 4 | 4 | | | | | | | | | |
| | Lara Arruabarrena | 6 | 6 | | | | | | | | | |
| | Lara Arruabarrena | 6 | 6 | | | Lara Arruabarrena | 6 | 6 | | | | |
| | | | | | WC | Sara Tomic | 2 | 3 | | | | |
| WC | Sara Tomic | 2 | 7 | 6 | WC | Sara Tomic | 2 | 3 | | | | |
| | Ons Jabeur | 6 | 5 | 4 | | | | | | | | |
| | Ons Jabeur | 6 | 5 | 4 | | | | | | Lara Arruabarrena | 4 | 1 |
| | | | | | | | | | | Verónica Cepede Royg | 6 | 6 |
| | Kateryna Bondarenko | 6$^4$ | 7$^8$ | 0 | | | | | | | | | Verónica Cepede Royg | 6 | 6 |
| | Christina McHale | 7$^7$ | 6$^6$ | 0$^r$ | | | | | | | | |
| | Christina McHale | 7$^7$ | 6$^6$ | 0$^r$ | | Kateryna Bondarenko | 6 | 3 | 6$^4$ | | | |
| | | | | | | Verónica Cepede Royg | 2 | 6 | 7$^7$ | | | |
| | Verónica Cepede Royg | 6 | 3 | 6 | | Verónica Cepede Royg | 2 | 6 | 7$^7$ | | | |
| 6 | Maria Sakkari | 4 | 6 | 3 | | | | | | | | |