Venus and Serena Williams (R) of the US talk during the women's doubles quarter final against Zheng Jie and Yan Zi of China at the US Open tennis tournament in New York, the US, Sept. 9, 2009. Venus and Serena Williams won the match 2-0.

Serena Williams (R) of the US returns a shot as her sister Venus Williams watches during the women's doubles quarter final against Zheng Jie and Yan Zi of China at the US Open tennis tournament in New York, the US, Sept. 9, 2009.

Yan Zi of China (R) returns a shot as her compatriot Zheng Jie watches during the women's doubles quarter final against Venus and Serena Williams of the US at the US Open tennis tournament in New York, the US, Sept. 9, 2009. Zheng Jie and Yan Zi lost the match 0-2.

Yan Zi of China (R) returns a shot as her compatriot Zheng Jie watches during the women's doubles quarter final against Venus and Serena Williams of the US at the US Open tennis tournament in New York, the US, Sept. 9, 2009.