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In page Caroline Wozniacki:

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She then entered the China Open in Beijing. In the third round, Wozniacki faced Petra Kvitová, who had routed her at Wimbledon. Wozniacki avenged that loss, which ensured that she would replace Serena Williams as the new world No. 1 after the tournament. She was the fifth player to reach the No. 1 position without having won a Grand Slam tournament. She also became the first Danish player, man or woman, to reach the top ranking.[8] Wozniacki ultimately won the tournament, defeating Zvonareva in the final to win her sixth title of the year and twelfth overall.