(CNN) -- Australian Sam Stosur completed her giant-killing habit at the French Open by beating top seed Serena Williams to book a place in the final four.
Stosur, who eased past four-time champion Justine Henin in the previous round, triumphed 6-2 6-7 8-6 in two hours and 24 minutes at Roland Garros.
The seventh seed will play Jelena Jankovic in the semifinal after the Serb beat Yaroslava Shvedova, from Kazakhstan, 7-5 6-4.
It means there will be a brand new Grand Slam winner by the end of the week, with none of the final four yet to break their duck at the major championships.
