The number 1 way to improve your tennis game is to study the best players in the world. Look at their form. Look at the way they walk. Look at their body language. Look at their feet. Look at their knees. Look at the their mental demeanor.
Next time you play, be them. After every point ask yourself this question: What would Rafa do? (Or whoever you happen to idolize). Then do it. Each time you do it, you will be building the chemistry to make yourself that person.
The French Open is on tomorrow at 9 AM. Rafa vs. Djokovic. Two of the best players to ever do it. Whose watching?!