Play starts at 1pm unless otherwise stated
KEN ROSEWALL ARENA
After 1 ATP match
Not before 3pm
Barbora STRYCOVA (CZE) v Ashleigh BARTY (AUS)
Dominika CIBULKOVA (SVK) v Angelique KERBER (GER)
[Q] Camila GIORGI (ITA) v Agnieszka RADWANSKA (POL)
SHOW COURT 1
After 2 ATP matches
Latisha CHAN (TPE) / Andrea SESTINI HLAVACKOVA (CZE)  v Kiki BERTENS (NED) / Johanna LARSSON (SWE)  or [Alt] Lara ARRUABARRENA (ESP) / Lauren DAVIS (USA)
Starting at 3pm
After 1 ATP match
Gabriela DABROWSKI (CAN) / XU Yifan (CHN)  v Lucie SAFAROVA (CZE) / Barbora STRYCOVA (CZE) 
The 2013 and 2014 Sydney finalists face off in the day's second quarterfinal. Dominika Cibulkova and Angelique Kerber's head-to-head is all square at 5-5, with the Slovak winning their first four encounters (between 2008-13), the German taking the next five (between 2014-16) and Cibulkova coming out on top of their most recent match, in the final of the 2016 WTA Finals. They have played three times in Australia to date, with Cibulkova winning in the first round of the Australian Open in 2011 and the 2013 Sydney semifinal, and Kerber taking their Sydney first round in 2014.
Two Australians are in the quarterfinal line-up, Ashleigh Barty and Daria Gavrilova (with the latter already through to the semifinals following Garbiñe Muguruza's withdrawal). This is the first time the Sydney International has had two home quarterfinalists since 2005, when Alicia Molik beat Samantha Stosur in an all-Australian final. That feat won't be repeated this year, as Barty and Gavrilova are in the same half of the draw.
Ashleigh Barty and Barbora Strycova have split their two meetings to date. The Czech beat an 18-year-old Barty 6-1, 6-3 in the first round of the US Open in 2014, but the Australian gained revenge in the second round of Birmingham last year, 6-3, 3-6, 6-1.
Camila Giorgi's win over Petra Kvitova meant that at least one qualifier has made the Sydney quarterfinals for the sixth consecutive year. In 2013, Madison Keys and Svetlana Kuznetsova reached the last eight; in 2014, Bethanie Mattek-Sands was a quarterfinalist while Tsvetana Pironkova won the whole thing; in 2015, Pironkova almost repeated that feat by making it to the semifinals out of qualifying; 2016 saw Monica Puig carve her way to the final; and last year, Duan Ying-Ying notched up her first Premier-level quarterfinal here.
Agnieszka Radwanska and Camila Giorgi have split their only two encounters to date. The Pole ended Giorgi's breakthrough run at Wimbledon 2012 in the fourth round, 6-2, 6-3, but the Italian was able to defeat Radwanska 6-4, 6-2 in front of her home crowd in the 2015 Katowice semifinals.