Have you seen the recent face-off between Rafael Nadal and Roger Federer? Federer used his power serve to topple his number one Spanish rival. For Federer, the game was first unleashed in his own court. Sometimes, the beginning may predict a good or bad ending, so always work on your service courts. You can either choose to strike left or right while there's a center line that divides the two directions in half. Like Federer, manipulate your own dominance, maybe not in Wimbledon but in a 27 feet wide by 21 feet long service court.