Victoria Azarenka made her way into the last 16 at this year’s Australian Open as she defeated Mona Barthel of Germany 6-2, 6-4.
She will next meet Iveta Benesova, who beat Russian qualifier Nina Bratchikova 6-1, 6-3.
Also through to the next round is world no.2 Petra Kvitova, after her opponent Maria Kirilenko of Russia retired injured at 6-0 1-0 down.
Kvitova’s next round opponent will be former world no.1 Ana Ivanovic.
Serena Williams outclassed Hungary’s Greta Arn 6-1 6-1 and will now face Ekaterina Makarova, who beat Vera Zvonareva.
To see all our predictions for upcoming matches, based on our machine learning model analysing results since 1960, see our tennis predictions page here.