India’s Sania Mirza and her partner Chuang Chia-Jung beat second seeds Anabel Garrigues and Virginia Pascual.

They defeated them 6-3 7-6(4) and sailed into the women’s double semifinal of the USD 4.5 million Sony Ericsson Open.

On a day of upsets, Sania and Chuang made their presence felt by pulling the rug from under the feet of their seeded opponent whose last ditch effort for a fightback wilted in tie-breaks with the Indo-Taiwan pair seeing it through.

Sania and Chuang’s semifinal opponents will be winner of the remaining quarterfinal match to be played between third-seeded Kveta Peschke and Lisa Raymond and Raquel Kops-Jones and Abigail Spears.

Sania and Chuang seemed to have struck the perfect chord and they had earlier stunned eighth seeds Maria Kirilenko and Flavia Pennetta in a gruelling three-setter in their previous encounter.