Sharapova, Chakvetadze, dan Ivanovic into semis

Sharapova booked her place after fighting her way back from a set down to overpower world number two Svetlana Kuznetsova 5-7 6-2 6-2, while Chakvetadze recovered from a second-set wobble to beat world number three Jelena Jankovic 6-4 0-6 6-3.

Ivanovic made the last four thanks to Sharapova`s victory, with the two players meeting on Friday to decide who will advance as group winner and avoid Henin in the semi-finals.

Henin had already booked her place from the yellow group but there was no letting up from the Belgian in her final round-robin match as she demolished Marion Bartoli 6-0 6-0 in 57 minutes.