Day five in Melbourne is coming to a close, with the fourth round awaiting our winners from a dramatic night session. Defending champion Naomi Osaka suffered a shock third-round exit at the hands of Amanda Anisimova, who will play Ash Barty after the top seed eased past Camila Giorgi. Meanwhile, Rafael Nadal dug deep to battle past game Russian Karen Khachanov in four sets. The tournament is over for China's Wang Qiang, who lost a tough three-setter against American Madison Keys. Elsewhere, Wang's compatriot Zhang Shuai and partner Sam Stosur have been knocked out of the women's doubles.