Fourth seed Andy Murray's beaten Mikhail Kukushkin to make the quarter-finals of the Australian tennis Open.
Murray was up two sets, winning both 6-1, and was leading the Kazahk 1-love before Kukushkin retired with injury.
The Scot will face Japan's Kei Nishikori in the quarter-finals, after Nishikori beat Frenchman Jo Wilfried Tsonga in five sets.
