Third-seeded Svetlana Kuznetsova, however, saw her bid to claim her first championship of the year come to an end.
Tatiana Golovin was a surprise victor over Kuznetsova, 6-2, 5-7, 6-1. Yan Zi claimed the other semifinal spot when Marion Bartoli retired in the second set. Bartoli was trailing at the time, 6-2, 3-0.
Golovin will take on Jankovic in the semifinals.