As with Serena Williams' health scare in her Wimbledon doubles match we may never know the origins of Andy Murray's aggravated yelling and cursing in his desultory straight-sets quarterfinal loss to Grigor Dimitrov. To be sure, he was in the midst of a near-beatdown at the craft Bulgarian's hands, and Dimitrov remarked after the match that the Brit didn't seem "quite right" even in the warmup. Luckily William and Kate, the Duke and Duchess of Cambridge, came to our relief with comical reactions to Murray's less-than-fine points during that match. Royals: They're just like us.

Murray himself was overheard shouting, "Shut the f— up!" toward his team and friends inhabiting his player's box, and also exclaimed, "Five minutes before the f—ing match!" at another moment, that when he was below William and Kate's position in the Royal Box on Centre Court. He may have lost his temper due to events off court, a far cry from his relative benign nature in the Stoic Ivan Lendl Coaching Era, but as Murray noted about the upstarts charging at tennis' top tier, it could have been something else entirely. It could be that Murray, as with others of late—namely Serena Williams and Rafael Nadal—senses a changing of the guard to come.

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