| Doubles | |
|---|---|
| 2019 Koser Jewelers Tennis Challenge | |
| Champions |  Vania King Claire Liu |
| Runners-up | Hayley Carter Jamie Loeb |
| Score | 4–6, 6–2, [10–5] |
Ellen Perez and Arina Rodionova were the defending champions, but lost in the quarterfinals to Vania King and Claire Liu. [1]
King and Liu went on to win the title, defeating Hayley Carter and Jamie Loeb in the final, 4–6, 6–2, [10–5].
Ellen Perez / Arina Rodionova (quarterfinals) Quinn Gleason / 
Luisa Stefani (semifinals)
Harriet Dart / 
Yanina Wickmayer (first round) Alison Bai / 
Elixane Lechemia (first round)| First round | Quarterfinals | Semifinals | Final | ||||||||||||||||||||||||
| 1 | E Perez Ar Rodionova | 77 | 6 | ||||||||||||||||||||||||
| M Brengle L Cabrera | 64 | 4 | 1 | E Perez Ar Rodionova | 4 | 64 | |||||||||||||||||||||
 P-h Chen Y-c Hsieh | 7 | 2 | [10] | WC | V King C Liu | 6 | 77 | ||||||||||||||||||||
| WC | V King C Liu | 5 | 6 | [12] | WC | V King C Liu | 7 | 6 | |||||||||||||||||||
| 4 | A Bai E Lechemia | 3 | 1 |  V Babić  E Shibahara | 5 | 4 | |||||||||||||||||||||
| V Babić E Shibahara | 6 | 6 | V Babić E Shibahara | 6 | 4 | [10] | |||||||||||||||||||||
| J Namigata E Webley-Smith | 6 | 6 | J Namigata E Webley-Smith | 4 | 6 | [8] | |||||||||||||||||||||
| R Anderson J Ponchet | 4 | 4 | WC | V King C Liu | 4 | 6 | [10] | ||||||||||||||||||||
| WC | S Chang A Mueller | 7 | 1 | [10] | H Carter J Loeb | 6 | 2 | [5] | |||||||||||||||||||
E-s Liang  L Zhu | 5 | 6 | [4] | WC | S Chang A Mueller | 2 | 4 | ||||||||||||||||||||
| H Carter J Loeb | 6 | 63 | [10] | H Carter J Loeb | 6 | 6 | |||||||||||||||||||||
| 3 | H Dart Y Wickmayer | 4 | 77 | [4] | H Carter J Loeb | 6 | 7 | ||||||||||||||||||||
 V Gracheva  K Zavatska | 4 | 4 | 2 | Q Gleason L Stefani | 4 | 5 | |||||||||||||||||||||
| WC | V Duval C Whoriskey | 6 | 6 | WC | V Duval C Whoriskey | 6 | 2 | [4] | |||||||||||||||||||
N Broady  J Glushko | 4 | 1 | 2 | Q Gleason L Stefani | 4 | 6 | [10] | ||||||||||||||||||||
| 2 | Q Gleason L Stefani | 6 | 6 | ||||||||||||||||||||||||
Jessica Moore and Storm Sanders were the defending champions, but both players chose to participate with different partners. Sanders played alongside Gabriella Da Silva-Fick, but lost in the first round to Destanee Aiava and Alicia Smith. Moore played alongside Ellen Perez, however they lost in the final to Asia Muhammad and Arina Rodionova, 6–4, 6–4.
Asia Muhammad and Arina Rodionova were the defending champions, but they lost in the final to Alison Bai and Zoe Hives, 4–6, 6–4, [10–8].
Daria Kasatkina was the defending champion, but lost in the quarterfinals to Julia Görges.
Cristiana Ferrando was the defending champion, but lost in the first round to Maria Sanchez.
Sophie Chang and Alexandra Mueller were the defending champions, but lost in the first round to Luisa Stefani and Renata Zarazúa.
Kiki Bertens and Johanna Larsson were the defending champions, but Bertens chose not to participate. Larsson played alongside Mona Barthel, but lost in the semifinals to Hsieh Shu-ying and Hsieh Su-wei.
Casey Dellacqua was the defending champion having won the previous edition in 2011, however she had retired from professional tennis in April 2018.
Tamara Zidanšek was the defending champion, but chose not to participate.
Asia Muhammad and Arina Rodionova were the defending champions, but Muhammad chose not to participate.
Samantha Stosur and Zhang Shuai defeated the defending champions Tímea Babos and Kristina Mladenovic in the final, 6–3, 6–4 to win the women's doubles tennis title at the 2019 Australian Open.
Vania King and Laura Robson were the defending champions, but neither player chose to participate.
Jessica Moore and Ellen Perez were the defending champions, but Moore chose to participate at the 2019 St. Petersburg Ladies' Trophy instead. Perez partnered alongside compatriot Arina Rodionova, but lost in the semifinals to Chang Kai-chen and Hsu Ching-wen.
Jessica Moore and Ellen Perez were the defending champions, but chose to participate with different partners. Moore partnered alongside Monique Adamczak but lost in the first round to Viktorija Golubic and Ingrid Neel. Perez partnered alongside Arina Rodionova but lost in the first round to Naiktha Bains and Naomi Broady.
Alicja Rosolska and Abigail Spears were the defending champions, but Spears chose not to participate this year. Rosolska played alongside Yang Zhaoxuan, but lost in the first round to Alexa Guarachi and Erin Routliffe.
Asia Muhammad and Maria Sanchez were the defending champions, but lost in the semifinals to Ellen Perez and Arina Rodionova.
Ellen Perez and Arina Rodionova were the defending champions, but chose not to participate.
Ellen Perez and Arina Rodionova were the defending champions, but chose not to participate.
Ellen Perez and Arina Rodionova were the defending champions but Rodionova chose not to participate.
Irina-Camelia Begu and Monica Niculescu were the defending champions, but they chose not to participate this year.
Destanee Aiava was the defending champion, but lost in the second round to Jang Su-jeong.