U.S. star Sloane Stephens set up a last eight clash with compatriot Serena Williams following her 6-3 6-4 win over Sweden's Sofia Arvidsson.

CNN: Djokovic's Australian Open preparations suffer hiccup

The shocks did not stop there as home hope and seventh seed Sam Stosur was beaten in the night match by Swede Sofia Arvidsson, going down 7-6 7-5.

CNN: STORY HIGHLIGHTS

Several young female players on the WTA Tour sport her collection in tournament play, including Sofia Arvidsson, Kai-Chen Chang, Indy De Vroome, Andrea Hlavackova, Madison Keys and Anastasia Pivovarova.

CNN: Grand slam designs: Maria Sharapova's fashion statement