Ramantha Stosur will face doubles partner Svetlana Kuznetsova in the semifinals of the Kremlin Cup after both players won in straight sets Friday. Stosur extended her unbeaten run to eight matches by defeating Ana Ivanovic 7-5, 6-4, while Kuznetsova beat second-seeded Roberta Vinci 6-2, 6-3. ‘Probably having a match won here last year, I certainly had a few things in my head that I wanted to try to do today against her,’ Stosur said. ‘And right from the start it was kind of working and from that my confidence kind of built.’