Re: Can Rafa radically change his playing style and stay in top?
23 is not relatively young in tennis terms, and I can't remember anything like that ever happening. The closest would probably be Borg serve and volleying at Wimbledon, but he still played his typical baseline style on other surfaces. However passing shots are much easier now than they were then thanks largely to the changes in technology. Now players can pass from a full stretch 10 feet behind the baseline which was simply impossible 30 years ago. For someone who is not a natural volleyer, he will have a pretty steep learning curve trying to figure out when to come to net and how to position himself once he gets there. As far as radically altering strokes, that is probably out of the question at this point.
Football is one of the few areas of life where even if you're untutored, you can go to a ground and see George Best beat three men, and you can realise, 'I have seen genius.'