China's Li Na powered past eighth seed Victoria Azarenka 6-3 6-3 to book a spot in the quarter-finals of the Australian Open on Sunday.
Li, who lost to Serena Williams in last year's Melbourne semi-finals, had too much firepower for Azarenka, the ninth seed blowing her off court in 88 minutes.
The first Chinese player to reach the top 10 in 2010, Li wrapped up an easy win with another crunching backhand Azarenka wearily dumped into the net.
Li will face either former champion Maria Sharapova or Germany's Andrea Petkovic in the last eight.
