Here's a Promo Video for the 1st Progressive Tennis App for a mobile Device..
For more information check out itennispro.net
Progressive Tennis is known as Quick Start tennis in the US, Play and Stay for the ITF...
The world is adopting progressive tennis as the best way for players to learn the game quickly and correctly. This app is the first in a series that will take players from beginners to intermediates to advanced faster than any other coaching method.