Williams, ranked No.1, will play four-time runner-up Maria Sharapova for the title Saturday night, reports Xinhua.
Williams had struggled in her previous two matches but played almost error-free tennis in the semifinal, using her superior power to keep Radwanska on the run. They played for 37 minutes and 55 points before Radwanska won a game.
Radwanska, who also lost to Williams in last year's Wimbledon final, fell to 1-11 against No.1 players.
--IANS (Posted on 29-03-2013)