The first thing that hits me is the big empty space on the right. The back ground if very over powering. Try less DOF. Rule of thirds would have helped this shot quite a bit. Had you composed the shot more to the left and given a bit of the defense it would have faired much better. The focus is suffering here also. It's tough to catch a moving tatget like that but keep up the work. I sense the force is stong in this one...hahaha just a little lame Star Wars humor.
This would have been a better shot if you had left less space behind the subject hitting the ball and had more of the net and opposing team in the shot. Easy for this to happen when you are trying to focus using the center point in your camera.
Good shot. If I could offer any suggestions, it would be that the right half of the image is wasted with empty space that adds nothing to the image. What I really want to see is more of the action on the left.