Caroline Wozniacki is in action on the Louis Armstrong court against Yung Jan-Chang at the US Open today.

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Wozniacki's opponents are facing an uphill battle to keep her on court for more than 50 minutes at this US Open. The Dane's progress to the third round has been short and sweet. She crushed one Taiwan player 6-0, 6-0 in the last round and now she's got another. Can Yung-Jan Chang do better than the hapless Kai-Chen Chang ?

Unfortunately for Yung-Jan's supporters, we're not optimistic. Like her compatriot she's another gritty baseliner who favours slow defensive moon-balls against the big hitters but the problem she has is that Wozniacki's in the form of her life and has the confidence to take them on and go for the lines. At the moment she's not missing.

They have played twice before. The first one was quite close, Wozniacki recovering from a poor start to win 3-6, 6-2, 6-3 in Doha two years ago but last year she cruised to a 6-3, 6-0 win in India.    

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