3rd seeds Sam Stosur and Rennae Stubbs defeated 8th seeds Bethanie Mattek-Sands and Nadia Petrova in straight sets today at the U.S. Open to advance to the semifinals. They will play the winner of what should be an intriguing quarterfinal: Black and Huber vs. Llagostera Vives and Martinez Sanchez. The top seeds and defending champions, Cara Black and Liezel Huber, have won six championships this year, as have the 6th seeds, Nuria Llagostera Vives and Maria Jose Martinez Sanchez.
Also winning their quarterfinal match were 13th seeds Alisa Kleybanova and Ekaterina Makarova, who upset 10th seeds Maria Kirilenko and Elena Vesnina in an all-Russian contest. Kleybanova and Makarova will play the winner of a quarterfinal featuring 4th seeds Serena and Venus Williams and 11th seeds Yan Zi and Zheng Jie, who are working on their comeback as a top doubles team.