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He was fine and laughing about it afterwards, but it certainly looked painful<p>World No. 2 Rafael Nadal got a bit overzealous while he was waiting for his matchup with Gilles Muller on Monday. Muller could barely fit under the door frame, but Nadal just couldn’t contain himself, and nothing gets a …

Read more at CBS Sports: http://www.cbssports.com/tennis/news/look-rafael-nadal-thunks-head-psyching-himself-up-for-wimbledon-match-up/