# 2018 Toray Pan Pacific Open – Singles

Caroline Wozniacki was the two-time defending champion, but lost in the second round to Camila Giorgi.
Karolína Plíšková won the title, defeating Naomi Osaka in the final, 6–4, 6–4. Plíšková won the title after saving two match points Alison Riske had against her in the quarterfinals.

## Seeds

The top four seeds received a bye into the second round.
* Caroline Wozniacki (second round)
* Caroline Garcia (quarterfinals)
* Naomi Osaka (final)
* Karolína Plíšková (champion)
* Sloane Stephens (first round)
* Garbiñe Muguruza (second round)
* Ashleigh Barty (second round)
* Barbora Strýcová (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 | Semifinals | Final | Final | Final | Final |
| | Camila Giorgi | 2 | 3 | | | | | |
| 3 | Naomi Osaka | 6 | 6 | | | | | |
| 3 | Naomi Osaka | 6 | 6 | | 3 | Naomi Osaka | 4 | 4 |
| | | | | | 4 | Karolína Plíšková | 6 | 6 |
| 4 | Karolína Plíšková | 6 | 4 | 6 | 4 | Karolína Plíšková | 6 | 6 |
| | Donna Vekić | 2 | 6 | 3 | | | | |

### Top 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 |
| | | | | | 1/WC | C Wozniacki | 2 | 6 | 4 | | | | | | | | |
| Q | M Doi | 2 | 1 | | | C Giorgi | 6 | 2 | 6 | | | | | | | | |
| | C Giorgi | 6 | 6 | | | | | | | | C Giorgi | 5 | | | | | |
| WC | V Azarenka | 6 | 7 | | | | | | | WC | V Azarenka | 3$^r$ | | | | | |
| WC | K Nara | 4 | 5 | | WC | V Azarenka | 6 | 6 | | | | | | | | | |
| | C Vandeweghe | 6 | 3 | 5 | 7 | A Barty | 4 | 2 | | | | | | | | | |
| 7 | A Barty | 4 | 6 | 7 | | | | | | | | | | | C Giorgi | 2 | 3 |
| | | | | | | | | | | | | | | 3 | N Osaka | 6 | 6 |
| | | | | | 3 | N Osaka | 6 | 6 | | | | | | | | | |
| Q | N Hibino | 1 | 7 | 3 | | D Cibulková | 2 | 1 | | | | | | | | | |
| | D Cibulková | 6 | 5 | 6 | | | | | | 3 | N Osaka | 6 | 6 | | | | |
| | K Mladenovic | 3 | 6$^5$ | | | | | | | 8 | B Strýcová | 3 | 4 | | | | |
| | A Kontaveit | 6 | 7$^7$ | | | A Kontaveit | 6$^5$ | 6 | 5 | | | | | | | | |
| Q | Z Diyas | 4 | 4 | | 8 | B Strýcová | 7$^7$ | 3 | 7 | | | | | | | | |
| 8 | B Strýcová | 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 | Semifinals | Semifinals |
| 6 | G Muguruza | 6 | 6 | | | | | | | | | | | | | | | | |
| | B Bencic | 2 | 4 | | 6 | G Muguruza | 1 | 2 | | | | | | | | | | | |
| Q | E Bouchard | 4 | 4 | | Q | A Riske | 6 | 6 | | | | | | | | | | | |
| Q | A Riske | 6 | 6 | | | | | | | Q | A Riske | 1 | 7$^7$ | 6$^4$ | | | | | |
| WC | Kr Plíšková | 6$^2$ | 6 | 6$^8$ | | | | | | 4 | Ka Plíšková | 6 | 6$^5$ | 7$^7$ | | | | | |
| | D Gavrilova | 7$^7$ | 3 | 7$^{10}$ | | D Gavrilova | 6 | 4 | 4 | | | | | | | | | | |
| | | | | | 4 | Ka Plíšková | 4 | 6 | 6 | | | | | | | | | | |
| | | | | | | | | | | | | | | | 4 | Ka Plíšková | 6 | 4 | 6 |
| 5 | S Stephens | 4 | 4 | | | | | | | | | | | | | D Vekić | 2 | 6 | 3 |
| | D Vekić | 6 | 6 | | | D Vekić | 6 | 7 | | | | | | | | | | | |
| Q | G Dabrowski | 2 | 0 | | | J Konta | 3 | 5 | | | | | | | | | | | |
| | J Konta | 6 | 6 | | | | | | | | D Vekić | 6 | 6 | | | | | | |
| | A Pavlyuchenkova | 6 | 6 | | | | | | | 2 | C Garcia | 3 | 4 | | | | | | |
| | A Sasnovich | 3 | 4 | | | A Pavlyuchenkova | 4 | 6 | 5 | | | | | | | | | | |
| | | | | | 2 | C Garcia | 6 | 2 | 7 | | | | | | | | | | |

## Qualifying
### Seeds

* Zarina Diyas (qualified)
* Magda Linette (qualifying competition)
* Alison Riske (qualified)
* Eugenie Bouchard (qualified)
* Duan Yingying (withdrew)
* Jana Fett (first round)
* Nao Hibino (qualified)
* Antonia Lottner (qualifying competition)
* Misaki Doi (qualified)
* Miyu Kato (withdrew)
* Ayano Shimizu (qualifying competition)
* Anna Zaja (first round)

### Qualifiers

* Zarina Diyas
* Nao Hibino
* Alison Riske
* Eugenie Bouchard
* Gabriela Dabrowski
* Misaki Doi

### Qualifying draw
#### First qualifier

| First round | First round | First round | First round | Qualifying competition | Qualifying competition | Qualifying competition | Qualifying competition |
| 1 | Zarina Diyas | 6 | 6 | | | | |
| | Miyabi Inoue | 4 | 3 | | | | |
| | Miyabi Inoue | 4 | 3 | 1 | Zarina Diyas | 6 | 6 |
| | | | | | Risa Ozaki | 1 | 0 |
| | Risa Ozaki | 6 | 7$^7$ | | Risa Ozaki | 1 | 0 |
| 12 | Anna Zaja | 2 | 6$^2$ | | | | |

#### Second qualifier

| First round | First round | First round | First round | Qualifying competition | Qualifying competition | Qualifying competition | Qualifying competition | Qualifying competition |
| 2 | Magda Linette | 7$^{10}$ | 6 | | | | | |
| | Momoko Kobori | 6$^8$ | 3 | | | | | |
| | Momoko Kobori | 6$^8$ | 3 | 2 | Magda Linette | 2 | 7$^7$ | 3 |
| | | | | 7 | Nao Hibino | 6 | 6$^3$ | 6 |
| | Erika Sema | 0 | 0 | 7 | Nao Hibino | 6 | 6$^3$ | 6 |
| 7 | Nao Hibino | 6 | 6 | | | | | |

#### Third qualifier

| First round | First round | First round | First round | Qualifying competition | Qualifying competition | Qualifying competition | Qualifying competition |
| 3 | Alison Riske | 6 | 6 | | | | |
| | Valeria Savinykh | 4 | 4 | | | | |
| | Valeria Savinykh | 4 | 4 | 3 | Alison Riske | 6 | 6 |
| | | | | 11 | Ayano Shimizu | 3 | 2 |
| WC | Mai Hontama | 1 | 4 | 11 | Ayano Shimizu | 3 | 2 |
| 11 | Ayano Shimizu | 6 | 6 | | | | |

#### Fourth qualifier

| First round | First round | First round | First round | Qualifying competition | Qualifying competition | Qualifying competition | Qualifying competition | Qualifying competition |
| 4 | Eugenie Bouchard | 6 | 6 | | | | | |
| WC | Moyuka Uchijima | 1 | 1 | | | | | |
| WC | Moyuka Uchijima | 1 | 1 | 4 | Eugenie Bouchard | 6 | 2 | 7 |
| | | | | WC | Chihiro Muramatsu | 1 | 6 | 5 |
| WC | Chihiro Muramatsu | 6 | 6 | WC | Chihiro Muramatsu | 1 | 6 | 5 |
| Alt | Misa Eguchi | 2 | 0 | | | | | |

#### Fifth qualifier

| First round | First round | First round | First round | First round | Qualifying competition | Qualifying competition | Qualifying competition | Qualifying competition |
| Alt | Gabriela Dabrowski | 6 | 6 | | | | | |
| | Miharu Imanishi | 3 | 2 | | | | | |
| | Miharu Imanishi | 3 | 2 | | Alt | Gabriela Dabrowski | 6 | 6 |
| | | | | | 8 | Antonia Lottner | 3 | 2 |
| | Mari Osaka | 3 | 6 | 3 | 8 | Antonia Lottner | 3 | 2 |
| 8 | Antonia Lottner | 6 | 4 | 6 | | | | |

#### Sixth qualifier

| First round | First round | First round | First round | Qualifying competition | Qualifying competition | Qualifying competition | Qualifying competition |
| 6 | Jana Fett | 3 | 2 | | | | |
| | Danielle Lao | 6 | 6 | | | | |
| | Danielle Lao | 6 | 6 | | Danielle Lao | 5 | 5 |
| | | | | 9 | Misaki Doi | 7 | 7 |
| WC | Haruka Kaji | 0 | 2 | 9 | Misaki Doi | 7 | 7 |
| 9 | Misaki Doi | 6 | 6 | | | | |