US OPEN

Singles

Men

Quarterfinals

Andy Murray (6), Britain def. Juan Martin del Potro (17), Argentina, 7-6 (2), 7-6 (1), 4-6, 7-5.

Women

Quarterfinals

Dinara Safina (6), Russia, def. Flavia Pennetta (16), Italy, 6-2, 6-3.

Serena Williams (4), United States, def. Venus Williams (7), United States, 7-6 (6), 7-6 (7).

Doubles

Men

Semifinals

Lukas Dlouhy, Czech Republic, and Leander Paes (7), India, def. Maximo Gonzalez and Juan Monaco, Argentina, 6-2, 6-0.

Bob and Mike Bryan (2), United States, def. Tommy Robredo, Spain, and Sergio Roitman, Argentina, 6-2, 6-1.

Women

Quarterfinals

Anabel Medina Garrigues and Virginia Ruano Pascual (5), Spain, def. Raquel Kops-Jones and Abigail Spears, United States, 2-6, 6-3, 7-6 (2).

Cara Black, Zimbabwe, and Liezel Huber (1), United States, def. Yan Zi and Zheng Jie (8), China, 6-4, 6-3.