Jefferson’s Zach Bost left quite a lasting first impression against any of his opponents on the high school tennis court when he chose to do so this season. With a toss of the ball into the air and a powerful follow through with his right arm, Bost could deliver a serve that could register 125 mph on the radar gun. Even though he often stayed away from muscling up on his power serve, in order to keep the ball in play and work on other portions of his game, it was always right there in his bag of tricks.