Play starts at 2pm
SCB CENTRE COURT
Ajla TOMLJANOVIC (AUS)  v ZHENG Saisai (CHN) 
Magda LINETTE (POL) v WANG Yafan (CHN)
Viktorija GOLUBIC (SUI) v Tamara ZIDANSEK (SLO)
Not before 6pm
Garbiñe MUGURUZA (ESP)  v Dayana YASTREMSKA (UKR) 
HAN Xinyun (CHN) / Darjia JURAK (CRO) v Mona BARTHEL (GER) / Sara SORRIBES TORMO (ESP)
After suitable rest
Anna BLINKOVA (RUS) / WANG Yafan (CHN) v PENG Shaui (CHN) / YANG Zhaoxuan (CHN)
Danaya Yastremska won her only previous match with Garbiñe Muguruza, 6-2, 6-3, in Luxembourg last year.
Ajla Tomljanovic has never before faced Zheng Saisai.
The No.6 seed has a 7-4 winning record against Chinese players, while her opponent boasts a 10-6 tally against Australians.
Magda Linette has never dropped a set against Wang Yafan, winning both their previous meetings in two.
WTA World No.106 Viktorija Golubic is the lowest-ranked player qualified for the quarterfinals.
Tamara Zidansek needed seven match points to beat Jennifer Brady on Thursday. She also had to fend off two from her opponent.