MELBOURNE: Third seed Ana Ivanovic was pushed all the way by Venus Williams before edging to a 7-6, 7-3 6-4 victory in Australian Open quarterfinal.
Ivanovic will play Slovakia's Daniela Hantuchova in the last-four.
Hantuchova, 24, marched into her first Grand Slam semi-final by thumping Polish teenager Agnieszka Radwanska.
The Slovakian kept up the tempo in the second, destroying Radwanska's serves, and quickly closed out a 6-2, 6-2 victory.
Maria Sharapova takes on Jelena Jankovic in the other women's semi-final.
