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Continue to ChatAre Two First Serves Ever Better Than One? http://www.tennisabstract.com/blog/2015/11/02/are-two-first-serves-ever-better-than-one/
Are Two First Serves Ever Better Than One? http://www.tennisabstract.com/blog/2015/11/02/are-two-first-serves-ever-better-than-one/