If you’ve ever picked up a tennis racket and attempted to serve against an opponent, you’ll know just how hard a skill it is. It’s one thing to get the ball over the net and yet a whole other thing to ...

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At this year’s Wimbledon, for example, fans witnessed the fastest serve in the tournament’s 148-year history, when Frenchman Giovanni Mpetshi Perricard unleashed a 153 mph rocket in his first-round ...