Tennis Channel Video: U.S. Open Day 10 Wrap

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Serena Williams came back from a set down to take out Tsvetana Pironkova, 4-6, 6-3, 6-2 on Wednesday to advance to her 14th career U.S. Open semifinal. The six-time U.S. Open champ is now just two wins away from capturing her 24th major championship and tying Margaret Court's all-time record.