Top-ranked Victoria Azarenka routed Kazakh qualifier Ksenia Pervak 6-1, 6-0 on Thursday to set up a possible semifinal showdown with Serena Williams at the Brisbane International.
Azarenka, the reigning Australian Open champion, needed only 68 minutes to win her quarterfinal, breaking Pervak's serve seven times.
Pervak opened the tournament with an upset win over former No. 1 Caroline Wozniacki, but didn't have anything left to trouble Azarenka after coming off consecutive third-set tiebreakers.
The third-ranked Williams faced fellow American Sloane Stephens in a night quarterfinal. Williams has won 33 of her last 34 matches, including titles at Wimbledon, the Olympics and U.S. Open. She has an 11-1 record against Azarenka, including a 5-0 mark in 2012.