Melbourne :World number five Andy Murray reached the Australian Open's last 16 in impeccable style Saturday as Swedish rival Robin Soderling and women's second seed Vera Zvonareva also went through.
Murray, last year's beaten finalist, dismissed Guillermo Garcia-Lopez of Spain 6-1, 6-1, 6-2 to go into the second week without dropping a set, as he seeks Britain's first Grand Slam title in 75 years.
Murray, 23, will play either 2006 finalist Marcos Baghdatis or Jurgen Melzer in the next round ahead of a possible quarter-final with in-form Swede Robin Soderling, who cruised through 6-3, 6-1, 6-4 against Jan Hernych.
"I have played well in the first three matches and it's tough to concentrate in this heat. It was a lot harder than the scoreline suggests," Murray said.
Soderling, the fourth seed, is now on an eight-match winning streak and one victory from his fourth successive Grand Slam quarter-final. He will play Ukraine's Alexandr Dolgopolov, who toppled 2008 finalist Jo-Wilfried Tsonga.
Milos Raonic, the 20-year-old Canadian with the thunderous serve, shocked 10th seed Mikhail Youzhny to reach the fourth round on debut, and register his first win against a top-10 player.
Montenegro-born Raonic, whose 230 kilometres (143 miles) screamer against Michael Llodra was the tournament's fastest serve, beat Russia's Youzhny 6-4, 7-5, 4-6, 6-4. Spain's David Ferrer also beat Lithuanian Richard Berankis, 20.
Meanwhile Russia's Zvonareva, who could finish this tournament as world number one, survived a Lucie Safarova fightback to stay on course for her third successive Grand Slam final.
Zvonareva looked set for an easy win until she tightened up and needed two match points in a tense tie-break before going through 6-3, 7-6 (11/9) thanks to a forehand error from the Czech.
"Today I had my chances and didn't use them, and then we had to go into this long second set," Zvonareva said. "That's something that I will definitely have to improve for the next matches."
Polish 12th seed Agnieszka Radwanska beat Romania's Simona Halep, while women's favourite Kim Clijsters was playing Alize Cornet of France.
Men's top seed Rafael Nadal will play Australian teen Bernard Tomic later as he continues his quest for the "Rafa Slam" which would unite all four Grand Slam titles for the first time since 1969.
Nadal won the French Open, Wimbledon and US Open last year after retiring hurt from his Australian Open quarter-final with Andy Murray due to a knee injury.