# 2019 Toray Pan Pacific Open – Singles

Karolína Plíšková was the defending champion, but chose to participate in Korea Open, instead.
Naomi Osaka became the first Japanese player (and the third overall) in 24 years to win the tournament, defeating Anastasia Pavlyuchenkova in straight sets.

## Seeds

The top four seeds received a bye into the second round.
* Naomi Osaka (champion)
* Kiki Bertens (second round)
* Sloane Stephens (second round)
* Angelique Kerber (semifinals)
* Madison Keys (quarterfinals, retired)
* Anastasija Sevastova (withdrew)
* Donna Vekić (second round)
* Petra Martić (withdrew)
* Elise Mertens (semifinals)

## 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 |
| 1 | Naomi Osaka | 6 | 6 | | | | |
| 9 | Elise Mertens | 4 | 1 | | | | |
| 9 | Elise Mertens | 4 | 1 | 1 | Naomi Osaka | 6 | 6 |
| | | | | | Anastasia Pavlyuchenkova | 2 | 3 |
| 4 | Angelique Kerber | 3 | 3 | | Anastasia Pavlyuchenkova | 2 | 3 |
| | Anastasia Pavlyuchenkova | 6 | 6 | | | | |

### 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 | N Osaka | 7 | 6 | | | | | | | | | |
| Q | A Cornet | 6 | 3 | 2 | Q | V Tomova | 5 | 3 | | | | | | | | | |
| Q | V Tomova | 4 | 6 | 6 | | | | | | 1 | N Osaka | 6 | 6 | | | | |
| WC | N Hibino | 4 | 5 | | | | | | | | Y Putintseva | 4 | 4 | | | | |
| Q | V Flink | 6 | 7 | | Q | V Flink | 1 | 1 | | | | | | | | | |
| | Y Putintseva | 6 | 7$^7$ | | | Y Putintseva | 6 | 6 | | | | | | | | | |
| LL | K Kawa | 4 | 6$^4$ | | | | | | | | | | | 1 | N Osaka | 6 | 6 |
| | | | | | | | | | | | | | | 9 | E Mertens | 4 | 1 |
| | | | | | 3 | S Stephens | 0 | 3 | | | | | | | | | |
| Q | X Han | 6$^6$ | 1 | | | C Giorgi | 6 | 6 | | | | | | | | | |
| | C Giorgi | 7$^8$ | 6 | | | | | | | | C Giorgi | 4 | 3 | | | | |
| | G Muguruza | 6 | 6$^1$ | 1 | | | | | | 9 | E Mertens | 6 | 6 | | | | |
| | S-w Hsieh | 3 | 7$^7$ | 6 | | S-w Hsieh | 3 | 6 | 2 | | | | | | | | |
| LL | W Osuigwe | 3 | 1 | | 9 | E Mertens | 6 | 1 | 6 | | | | | | | | |
| 9 | E Mertens | 6 | 6 | | | | | | | | | | | | | | |

### Bottom half

| 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 |
| 5 | M Keys | 6 | 6 | | | | | | | | | | | | | | |
| | D Kasatkina | 3 | 4 | 5 | M Keys | 5 | 6 | 6 | | | | | | | | | |
| | M Puig | 0 | 3 | Q | Z Diyas | 7 | 0 | 4 | | | | | | | | | |
| Q | Z Diyas | 6 | 6 | | | | | | 5 | M Keys | 4 | 6 | 1$^r$ | | | | |
| | A Riske | 4 | 3 | | | | | | 4 | A Kerber | 6 | 4 | 2 | | | | |
| Q | N Gibbs | 6 | 6 | Q | N Gibbs | 2 | 4 | | | | | | | | | | |
| | | | | 4 | A Kerber | 6 | 6 | | | | | | | | | | |
| | | | | | | | | | | | | | | 4 | A Kerber | 3 | 3 |
| 7 | D Vekić | 7 | 6 | | | | | | | | | | | | A Pavlyuchenkova | 6 | 6 |
| | C Garcia | 5 | 2 | 7 | D Vekić | 6$^5$ | 3 | | | | | | | | | | |
| | K Mladenovic | 1 | 2 | WC | M Doi | 7$^7$ | 6 | | | | | | | | | | |
| WC | M Doi | 6 | 6 | | | | | | WC | M Doi | 2 | 2 | | | | | |
| | D Yastremska | 3 | 1 | | | | | | | A Pavlyuchenkova | 6 | 6 | | | | | |
| | A Pavlyuchenkova | 6 | 6 | | A Pavlyuchenkova | 6 | 7 | | | | | | | | | | |
| | | | | 2 | K Bertens | 1 | 5 | | | | | | | | | | |

## Qualifying
### Seeds

* Alizé Cornet (qualified)
* Zarina Diyas (qualified)
* Astra Sharma (first round, retired)
* Whitney Osuigwe (qualifying competition, lucky loser)
* Katarzyna Kawa (qualifying competition, lucky loser)
* Liudmila Samsonova (qualifying competition)
* Nicole Gibbs (qualified)
* Francesca Di Lorenzo (first round)
* Kristína Kučová (first round)
* Varvara Flink (qualified)
* Han Xinyun (qualified)
* Kurumi Nara (qualifying competition)

### Qualifiers

* Alizé Cornet
* Zarina Diyas
* Han Xinyun
* Nicole Gibbs
* Varvara Flink
* Viktoriya Tomova

### Lucky losers

* Whitney Osuigwe
* Katarzyna Kawa

### Draw
#### First qualifier

| First round | First round | First round | First round | Qualifying competition | Qualifying competition | Qualifying competition | Qualifying competition | Qualifying competition |
| 1 | Alizé Cornet | 6 | 6 | | | | | |
| WC | Moyuka Uchijima | 0 | 4 | | | | | |
| WC | Moyuka Uchijima | 0 | 4 | 1 | Alizé Cornet | 6$^3$ | 7$^7$ | 6 |
| | | | | 12 | Kurumi Nara | 7$^7$ | 6$^2$ | 2 |
| | Momoko Kobori | 3 | 2 | 12 | Kurumi Nara | 7$^7$ | 6$^2$ | 2 |
| 12 | Kurumi Nara | 6 | 6 | | | | | |

#### Second qualifier

| First round | First round | First round | First round | Qualifying competition | Qualifying competition | Qualifying competition | Qualifying competition |
| 2 | Zarina Diyas | 6 | 6 | | | | |
| | Miharu Imanishi | 1 | 4 | | | | |
| | Miharu Imanishi | 1 | 4 | 2 | Zarina Diyas | 6 | 6 |
| | | | | WC | Kyōka Okamura | 1 | 2 |
| WC | Kyōka Okamura | 6 | 6 | WC | Kyōka Okamura | 1 | 2 |
| 9 | Kristína Kučová | 2 | 1 | | | | |

#### Third qualifier

| First round | First round | First round | First round | Qualifying competition | Qualifying competition | Qualifying competition | Qualifying competition | Qualifying competition |
| 3 | Astra Sharma | 6 | 1$^r$ | | | | | |
| | Yuki Naito | 1 | 4 | | | | | |
| | Yuki Naito | 1 | 4 | | Yuki Naito | 3 | 6 | 1 |
| | | | | 11 | Han Xinyun | 6 | 4 | 6 |
| | Risa Ozaki | 2 | 3 | 11 | Han Xinyun | 6 | 4 | 6 |
| 11 | Han Xinyun | 6 | 6 | | | | | |

#### Fourth qualifier

| First round | First round | First round | First round | First round | Qualifying competition | Qualifying competition | Qualifying competition | Qualifying competition |
| 4 | Whitney Osuigwe | 6 | 5 | 6 | | | | |
| | Leylah Annie Fernandez | 4 | 7 | 2 | | | | |
| | Leylah Annie Fernandez | 4 | 7 | 2 | 4 | Whitney Osuigwe | 4 | 3 |
| | | | | | 7 | Nicole Gibbs | 6 | 6 |
| | Ayano Shimizu | 2 | 3 | | 7 | Nicole Gibbs | 6 | 6 |
| 7 | Nicole Gibbs | 6 | 6 | | | | | |

#### Fifth qualifier

| First round | First round | First round | First round | First round | Qualifying competition | Qualifying competition | Qualifying competition | Qualifying competition |
| 5 | Katarzyna Kawa | 6 | 2 | 6 | | | | |
| | Mayo Hibi | 4 | 6 | 4 | | | | |
| | Mayo Hibi | 4 | 6 | 4 | 5 | Katarzyna Kawa | 1 | 6$^3$ |
| | | | | | 10 | Varvara Flink | 6 | 7$^7$ |
| WC | Mai Hontama | 3 | 7$^{12}$ | 3 | 10 | Varvara Flink | 6 | 7$^7$ |
| 10 | Varvara Flink | 6 | 6$^{10}$ | 6 | | | | |

#### Sixth qualifier

| First round | First round | First round | First round | First round | Qualifying competition | Qualifying competition | Qualifying competition | Qualifying competition | Qualifying competition |
| 6 | Liudmila Samsonova | 2 | 6 | 7 | | | | | |
| WC | Akiko Omae | 6 | 4 | 5 | | | | | |
| WC | Akiko Omae | 6 | 4 | 5 | 6 | Liudmila Samsonova | 6 | 0 | 4 |
| | | | | | | Viktoriya Tomova | 3 | 6 | 6 |
| | Viktoriya Tomova | 3 | 6 | 6 | | Viktoriya Tomova | 3 | 6 | 6 |
| 8 | Francesca Di Lorenzo | 6 | 3 | 1 | | | | | |