I commented on this in another thread but it got buried amid all the replies. It is my belief that the strings have a far greater impact on a player's performance than does the racquet itself. The strings, after all, are what make contact with the ball. Finding the right string set up is what matters most to the pros. That is why top players so seldomly switch frames and use painted versions of the frame they've used forever. They could certainly play equally well with another model or another brand of racquet. Lets face it, none of the so called 'players' racquets are all that unique. But changing frames would mean experimenting to find the right string set up for that particular frame. Most do not wish to be bothered or have the time to go through all that so they keep playing with the same frame as all it is doing is holding their desired string set up. The playing characteristics of a racquet can vary greatly depending on how, with what, and how tightly it is strung. I know I will change the string, the gauge, the tension, in my racquets depending on when, where, on what, in what climate, and sometimes who I am playing. Simply put, the racquet holds the strings.