US Open: Serena, Vinci advance to last eightNew York: Second seed Agnieszka Radwanska of Poland crashed out of the US Open after she lost to Roberta Vinci of Italy here last night.

Radwanska was stunned 1-6, 4-6 in the fourth round match.

She would now meet her compatriot Sara Errani who pulled an upset victory over sixth seeded Angelique Kerber of Germany 7-6, 6-3.

Meanwhile, Serena Williams continued her domination and moved into the quarter finals of the tournament without dropping a set.

Williams Andrea Hlavackova 6-0, 6-0 in 57 minutes.

Williamswill next face former No 1 Ana Ivanovic, who beat Tsvetana Pironkova 6-0, 6-4.

By Indian Sports News Network