Andy Murray the world number 3 has moved into the last 16 of the Australian Open with a win over Ricardas Berankis of Lithuania 6-3 6-4 7-5. Murray next opponent will be a Frenchman, either Gael Monfils or Gilles Simon. There was a shock defeat for Juan Martin Del Potro losing to Jeremy Chardy in five sets. Murray and Del Potro were on course to meet in the last eight. Laura Robson run has come to an end, the young Brit losing to American Sloane Stephens 7-5 6-3.