Sania Mirza and Cara Black today shocked top seeded Italians Sara Errani and Roberta Vinci to storm into the summit clash of the China Open, extending their unbeaten run to eight matches now.

Sania and Zimbabwe's Cara, who came into the tournament after winning the Tokyo event, swept aside the challenge of formidable Italians 6-4 6-4 in one hour and 12 minutes.