I know of no credible coach or any book that advocates painting the baseline. As players skill sets improve they are able to control the ball to the point where getting "close/closer" might be more of an option under certain circumstances. You have basically suggested that "everyone" teaches/advocates hitting extremely deep on a regular basis - this just isn't the case. What might be considered a risky shot at one level isn't at another - several other posters have brought this to your attention also. There are probably hundreds of tennis books that have been published over the last hundred years. I probably have close to fifty, others like Dave Smith have many more, but I quite confident not one of them advises players to paint the baseline. This is something I believe you've invented/created for your own purposes. Many of us come from technical or educational backgrounds where references are extremely important/necessary. As far as I know, you have not provided any references other than general comments & you have not provided any specific information on this new charting system which allows you to come to these conclusions. Suggesting that analysis of pro matches applies to all levels is also something that most of us probably have problems with - once again, if you have solid evidence that proves otherwise, give us references or data that proves your point. You can jump up and down and try to deflect the questions but most here are smart enough to see through this technique. Your very quick when cornered to start saying things which you and everyone else knows aren't true and you cannot provide examples of what your saying. You have been asked for references and example of your charting to support your position - to date I haven't seen any.