"Top player complete copy manual Vol.1" of the latest tennis technology became a digital book that was able to be read with iPad and it appeared. A convenient CG image for the confirmation of the operation image to say nothing of being able to read the text and the illustration with iPad was collected, and only iPad made inspection possible.
It analyzes based on data that analyzes each form of the one hand backhand stroke by three dimensions as the forehand that Roger Federer strikes depressing it and it explains in detail.