New York: Indian tennis player Sania Mirza moved into the women's doubles semi-finals of the US Open with Zimbabwe partner Cara Black after rivals Zarina Diyas and Yi-Fan Xu retired in the quarters.

Third seeds Sania and Cara took the first set 6-1 in 40 minutes and won a game in the second set when Kazakh Zarina and her Chinese partner Yi-Fan retired at the Flushing Meadows here Tuesday.