Sania Mirza and her partner Anastasia Rodionova have booked a semi-final berth in the women's doubles event of the Estoril Open tennis tournament in Portugal. In the quarter-finals at Estoril, the second seeded Indo-Australian pair defeated their American rivals Megan Moulton-Levy and Lindsay Lee-Waters in straight sets 6-0 6-4.The Indo-Australian duo will next face Kazakhstan's third seeded pair of Yaroslava Shvedova and Galina Voskoboeva for a place in the final of the 220,000 U.S. dollar clay court event.Rodionova had beaten Sania in the 2010 Commonwealth Games women's singles final.