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Isn't the thrower going to have to throw a tennis ball 250-500 times to win a 2-3 set match? Maybe more even if the strategy depends on unforced errors from the opponent. I don't think throwing the ball with any pace is an option.

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But you don't need to be whipping fastballs for all of those throws. I do agree that if the raquest side can stretch the game out, the catcher doesn't stand a chance.