Errani doing double duty at US Open

Women's doubles World No 1 Sara Errani is bidding for a rare two-title run at the US Open, advancing to the women's doubles final on Thursday after having booked a berth in the singles semifinals.

Italy's Errani and best friend Roberta Vinci defeated Nuria Llagostera Vives and Maria Jose Martinez Sanchez of Spain 6-3, 6-2 to reach a spot in Sunday's women's doubles final.

Errani, a 10th seed in singles, also will play 14-time Grand Slam champion Serena Williams in Friday's women's singles semi-finals after defeating Vinci 6-2, 6-4 on Wednesday in an all-Italian quarterfinal.