When you go into a game on offense, you make a couple moves and see what the defender is going to do. Then you pretty much can figure out what he is going to do against you - whether he carries his hands low or high, whether he is bumping or pushing, those type of things.
You've got to learn the footwork, the positioning, how to box out, how to pass, how to shoot your free throws. All these things are necessary, not to be the No. 1 player in the world, but maybe you can play against him.