Zheng Jie became the first wild card to reach a semi-final of the ladies' singles and the first Chinese woman in the last four of a Grand Slam semi-final as she beat 18th seed Nicole Vaidisova 6-2, 5-7, 6-1.
Zheng, who is ranked 133 in the world and has beaten three seeds already, included top seed Ana Ivanovic, will play Serena Williams in the semi-finals.
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