A couple of weeks ago I did this very interesting exercise on tennis practice focusing on using the angles. Such a simple drill - you only need some cones - and very helpfull. It just opened up another dimension to my game -> The Angles. I already did this drill several times. You can actually do it when rallying with a friend without him even noticing it. Now, when playing I have a more broader view of the court, and of what my options are. I'm a 4.0 players but I used to just hit the ball aggressively, but many times co the center of the court, but now I can move my opponent from side to side and just open up the court. Some diagrams and the full drill explained here: http://online-tennis-blog.blogspot.com/ Tell me what you think. Thanks.