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"Rafael Nadal has confirmed he may have to pull out of next month's Indian Wells Masters because of his fragile knees."^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.skysports.com/tennis/news/12110/8527354/rafa-nadal-is-still-hoping-to-play-at-the-indian-wells-masters-next-month>