Second seed Vera Zvonareva needed just 76 minutes to book her place in the quarter-finals of the Australian Open on Monday.
Zvonareva will meet Petra Kvitova in the last eight after beating another Czech player, Iveta Benesova, 6-4 6-1 on Hisense Arena.
The 26-year-old Russian hit four aces and 21 winners in total as she broke her opponent's serve five times.
Zvonareva reached two grand slam finals in 2010 - at Wimbledon and the US Open - and will be favourite to make it into the semi-finals when she takes on 25th seed Kvitova in the quarters.
Kvitova put out 22nd seed Flavia Pennetta of Italy, recovering from a set down to win 3-6 6-3 6-3.