The Isner – Nadal match in Indian Wells got one of the commentators to commend John Isner’s focus, concentration, self-belief and not least – his big serve. He even compared receiving a big serve like that to being the goalie for a penalty kick in soccer. The goalie doesn’t have time to read the ball and plan his plunge. At best, he can guess and jump to one side. Same with a big serve. You don’t have time to read it. You make a guess and swing at the ball. Hopefully at some point that becomes an inherent instinct, a reflex.