The women's top seed and defending champion are both in third round action this morning at the Australian Open.
Ash Barty and Naomi Osaka will meet in round 4 if they come through respective matches with Camila Giorgi and Amanda Anisimova.
Russian Karen Khachanov is the latest roadblock standing between Rafa Nadal and a potential 21st Grand Slam.
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And third seed Alexander Zverev faces Romanian qualifier, Radu Albot.
Already today, there have been wins in round 3 for Victoria Azarenka, Maria Sakkari and Barbora Krejcikova.
