Learning limits
In tennis it’s sort of like driving a car, if you drive the car too fast you have a lot of wreaks. if you drive the car to slow you don’t really challenge yourself to improve and can’t manage the highway. In Tennis you learn to use utilize your skills and maximize, but not overplayed them so that you don’t understand the limit of your proficiency. Learn what you can and can not do with certain shot and you can apply that to winning matches.