The women's draw at the Brisbane International was thrown wide open Tuesday after top seeds Samantha Stosur and Shahar Peer were bundled out in the second round by unheralded opponents.

World No.6 Stosur was beaten by fellow Australian Jarmila Groth 6-2, 6-4 in the tournament's biggest shock, while earlier in the day the Czech Republic's Lucie Safarova outlasted second seed Peer 3-6, 6-1, 7-5.

Marion Bartoli is now the highest ranked player left in the women's draw.

Safarova will play fifth seed Anastasia Pavlyuchenkova in the quarters following the Russian's 6-2, 7-5 win over Serbia's Bojana Jovanovski 6-2, 7-5.

Italy's Roberta Vinci earlier completed the women's first round when she beat American Christina McHale in straight sets 6-2, 7-6 (7/2).

Agencies