US Open 2011 Women's Singles Semi Finals

• Caroline Wozniacki DEN (1) vs       Serena Williams USA (28) - 2-6, 4-6
• Angelique Kerber GER vs       Samantha Stosur AUS (9) - 3-6, 6-2, 2-6

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US Open 2011 Men's Singles Semi Finals

• Novak Djokovic SRB (1) vs Roger Federer SUI (3) - 6⁷-7⁹, 4-5, 6-3, 6-2, 7-5
• Andy Murray GBR (4) vs Rafael Nadal ESP (2) - 4-6, 2-6, 6-3, 2-6

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