ORDER OF PLAY
CENTER -- 12:00 noon start
[Q] Priscilla HON (AUS) vs.  Ajla TOMLJANOVIC (AUS)
 Karolina MUCHOVA (CZE) vs. [Q] Timea BABOS (HUN)
[Q] Patricia Maria TIG (ROU) vs. Paula BADOSA (ESP)
Karolina PLISKOVA (CZE) / Kristyna PLISKOVA (CZE) vs.  Irina-Camelia BEGU (ROU) / Margarita GASPARYAN (RUS)
Not before 5:00 p.m. -- possible court change
Laura PIGOSSI (BRA) / WANG Yafan (CHN) vs. CHOI Ji-Hee (KOR) / HAN Na-Lae (KOR)
COURT 2 -- 4:00 p.m. start
Lara ARRUABARRENA (ESP) / Tatjana MARIA (GER) vs.  Cornelia LISTER (SWE) / Renata VORACOVA (CZE)
No.3 seed Karolina Muchova and qualifier Timea Babos will face off for the first time on Thursday. Muchova is seeking her fifth tour-level quarterfinal appearance of the season; her 2019 season already includes a maiden WTA singles final at Prague, and a first-ever Grand Slam quarterfinal showing in her Wimbledon main-draw debut.
No.5 seed Ajla Tomljanovic and qualifier Priscilla Hon will meet for the first time in an all-Australian affair. Tomljanovic is aiming for a sixth WTA quarterfinal appearance of the season, while Hon seeks her first of the year. Hon nearly made the quarterfinals at Hiroshima last week when she pushed top seed and defending champion Hsieh Su-wei deep into a third set in a second-round battle.
Paula Badosa has a 2-1 head-to-head lead over Patricia Maria Tig. They played each other most recently in the first round of Wimbledon qualifying earlier this summer, where Badosa emerged with a three-set victory.
Twin sisters Karolina and Kristyna Pliskova are partnering in doubles for the second time this season, and they are a win away from reaching the semifinals at both of those tournaments. The Pliskovas also reached the final four in Cincinnati before falling to eventual champions Lucie Hradecka and Andreja Klepac.