Tennis star Rafael Nadal

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Rafael Nadal pulls out of US Open with knee injury The Associated Press Getty Images Getty Images Getty Images Getty Images Getty Images Getty Images Getty Images Getty Images Getty Images Getty Images Getty Images Getty Images Getty Images Getty Images Getty Images Getty Images Getty Images Getty Images Getty Images Getty Images Getty Images Getty Images Getty Images Getty Images Getty Images Getty Images Getty Images Getty Images Getty Images Getty Images Getty Images Getty Images Getty Images Getty Images Getty Images Getty Images Getty Images Getty Images Getty Images Getty Images Getty Images Getty Images Getty Images Getty Images Getty Images Getty Images Getty Images Getty Images Getty Images Getty Images

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Rafael Nadal pulled out of the London Olympics on Thursday due to injury.

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