The great coaches are like a great hunter they study the opponent before he goes hunting or before he plays the match!
The players knows it’s habits, he knows where it lives, how it’s going to act, it’s likes and dislikes, do you know what your opponent likes and dislikes? how i am going to stock this Hunter? and play this match so that it is to my advantage? The goal is understand so I can win. The best players remember tennis is a chess game and you have to know the habits of your opponent.