 that you could control everything and you can't like michael phelps at a certain point is just competing against the water like against himself yeah like you know how little drag can i create versus how much force i can create like at a certain point it's just a physics equation because nobody can touch you any longer it's just a matter of how much faster you can be than the last time you did it you know serena obviously you're playing against an opponent who's returning serve and volley