US Open: Caroline Wozniacki, Roberta Vinci Storm Into Fourth Round

Caroline Wozniacki, who knocked out ninth-seeded former champion Svetlana Kuznetsova in the second round, defeated Monica Niculescu of Romania 6-3, 6-1. On the other hand, Roberta Vinci overcame a second set blip to defeat Carina Witthoeft 6-0, 5-7, 6-3