Murray earned his match with Nadal after earlier defeating John Isner 7-6 6-3 6-2 . ` Ivo Karlovic to meet Andy Murray in quarter-finals of Australian Open after beating Roger Federer 6-4 4-6 6-4 6-4 . Andy Murray sets up a last-16 encounter with Lleyton Hewitt at the Australian Open after a routine victory over Albert Montanes . Fourth seed Juan Martin Del Potro and seventh seed Andy Roddick are also through after they win in four sets . seventh seed Andy Murray cruises into Fourth round and is on course to face Nadal in the quarterfinals .
Ivo Karlovic to meet Andy Murray in quarter-finals of Australian Open after beating Roger Federer 6-4 4-6 6-4 6-4 . Andy Murray sets up a last-16 encounter with Lleyton Hewitt at the Australian Open after a routine victory over Albert Montanes . Fourth seed Juan Martin Del Potro and seventh seed Andy Roddick are also through after they win in four sets . seventh seed Andy Murray cruises into Fourth round and is on course to face Nadal in the quarterfinals .