# 2019 Tennis Championships of Honolulu – Singles

Nao Hibino was the defending champion, but chose not to participate.
Usue Maitane Arconada won the title, defeating Nicole Gibbs in the final, 6–0, 6–2.

## Seeds

* Whitney Osuigwe (quarterfinals)
* Nicole Gibbs (final)
* Ayano Shimizu (first round)
* Arina Rodionova (second round)
* Usue Maitane Arconada (champion)
* Risa Ozaki (second round)
* Zhang Yuxuan (first round)
* Deniz Khazaniuk (second round)

## 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 |
| | Jamie Loeb | 2 | 4 | | | | | |
| 5 | Usue Maitane Arconada | 6 | 6 | | | | | |
| 5 | Usue Maitane Arconada | 6 | 6 | | 5 | Usue Maitane Arconada | 6 | 6 |
| | | | | | 2 | Nicole Gibbs | 0 | 2 |
| | Caroline Dolehide | 4 | 7$^8$ | 4 | 2 | Nicole Gibbs | 0 | 2 |
| 2 | Nicole Gibbs | 6 | 6$^6$ | 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 | Quarterfinals | Semifinals | Semifinals | Semifinals | Semifinals |
| 1/WC | W Osuigwe | 6 | 6 | | | | | | | | | | | | | | | |
| WC | A Tobita | 4 | 2 | | 1/WC | W Osuigwe | 3 | | | | | | | | | | | |
| | X You | 7 | 3 | 4 | | E Bektas | 2$^r$ | | | | | | | | | | | |
| | E Bektas | 5 | 6 | 6 | | | | | | 1/WC | W Osuigwe | 4 | 6 | 1 | | | | |
| | G Brodsky | 4 | 3 | | | | | | | | J Loeb | 6 | 4 | 6 | | | | |
| | M Hontama | 6 | 6 | | | M Hontama | 5 | 3 | | | | | | | | | | |
| | J Loeb | 6 | 6 | | | J Loeb | 7 | 6 | | | | | | | | | | |
| 7 | Y Zhang | 4 | 1 | | | | | | | | | | | | | J Loeb | 2 | 4 |
| 4 | Ar Rodionova | 6 | 6 | | | | | | | | | | | | 5 | UM Arconada | 6 | 6 |
| | C Harrison | 4 | 2 | | 4 | Ar Rodionova | 1 | 2 | | | | | | | | | | |
| | M Hibi | 6 | 6 | | | M Hibi | 6 | 6 | | | | | | | | | | |
| | J Namigata | 4 | 1 | | | | | | | | M Hibi | 3 | 3 | | | | | |
| | M Manasse | 7 | 6 | | | | | | | 5 | UM Arconada | 6 | 6 | | | | | |
| Q | G Olmos | 5 | 2 | | | M Manasse | 6 | 2 | 2 | | | | | | | | | |
| | H Baptiste | 3 | 2 | | 5 | UM Arconada | 2 | 6 | 6 | | | | | | | | | |
| 5 | UM Arconada | 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 | R Ozaki | 7 | 6 | | | | | | | | | | | | | | | | |
| WC | K Chen | 5 | 4 | | 6 | R Ozaki | 5 | 3 | | | | | | | | | | | |
| Q | S Chang | 6$^5$ | 3 | | | K Day | 7 | 6 | | | | | | | | | | | |
| | K Day | 7$^7$ | 6 | | | | | | | | K Day | 7 | 3 | 1 | | | | | |
| WC | N Subhash | 6 | 7 | | | | | | | | C Dolehide | 5 | 6 | 6 | | | | | |
| Q | C Simmonds | 3 | 5 | | WC | N Subhash | 2 | 3 | | | | | | | | | | | |
| | C Dolehide | 4 | 6 | 6 | | C Dolehide | 6 | 6 | | | | | | | | | | | |
| 3 | A Shimizu | 6 | 1 | 1 | | | | | | | | | | | | C Dolehide | 4 | 7$^8$ | 4 |
| 8 | D Khazaniuk | 1 | 6 | 6 | | | | | | | | | | | 2 | N Gibbs | 6 | 6$^6$ | 6 |
| Q | M Ozeki | 6 | 3 | 4 | 8 | D Khazaniuk | 6 | 4 | 1 | | | | | | | | | | |
| | Q Gleason | 6 | 6 | | | Q Gleason | 1 | 6 | 6 | | | | | | | | | | |
| Q | F Al-Nabhani | 3 | 0 | | | | | | | | Q Gleason | 3 | 1 | | | | | | |
| Q | A Parks | 6 | 6 | | | | | | | 2 | N Gibbs | 6 | 6 | | | | | | |
| Q | V Babić | 3 | 4 | | Q | A Parks | 2 | 2 | | | | | | | | | | | |
| Q | S Whittle | 6$^3$ | 6 | 3 | 2 | N Gibbs | 6 | 6 | | | | | | | | | | | |
| 2 | N Gibbs | 7$^7$ | 4 | 6 | | | | | | | | | | | | | | | |