For this drill you need a ball machine or a coach feeding you consistent balls on your forehand.
Targets are placed forehand and backhand corner as well as forehand corner at service line
Player is trying to hit first ball deep cross court, second short cross court, third ball deep down the line
The idea of this drill is to open the court with topspin and later hit the ball down-the-line to finish off the point with more aggressive and flat ball