Set up the same as 5 error drill. Place a line of balls (or tape) halfway between the service line and the baseline. The ball feeder sets a timer for about 3 minutes. They then feed player A forehands and backhands. B and C return the balls back to A. Any ball that A hits that falls below the service line is -1. Balls between the service line and the line of balls are worth 0. Balls that land behind the line of balls are worth +1. Player A tries to get to 10 points (or positive numbers) before time runs up.