Bud Collins in his book, John Barrett in latest magazine of Tennis Head, John McEnroe, Peter Fleming, Chris Evert, Martina Navaratilova, John Lloyd to name but a few....
"Bjorn Borg has proposed that, while club and amateur players go on hitting as they like, that the pros return to wood. John McEnroe has said it and written about it. If you’re among the best players in the world, you should surely be able to focus on a smaller sweet spot, generate your own pace, and win by displaying subtlety and variety in shotmaking rather than bludgeoning your opponent with casts of steel. Martina Navratilova recently publically endorsed, at the least, lessening the width of racquets, also being sure to insist that the game itself not be changed to accomodate the development of these super-charged excalibers. “Something needs to be done about the racquets,” says Navratilova. “The materials are ridiculous now. The game’s too easy with these racquets.”
The emphasis given by wood racquets to the elements of feel, touch, and control in tennis have likewise been “overruled” by the new power game and power establishment. Some people will say, “The equipment has improved. What can you do?”
But it is worth considering that perhaps the equipment hasn’t “improved” if the effect of those changes is to bring the game down below its efficiency level to function as a sport not purely about results and winning, but about process and the disciplining and refining of the spirits of the players, and staying true to the soul of the game.
It's very hard to possess the perspectives above unless you play or have played to a high level. If you haven't played to a high level you will find it extremely hard to understand and comprehend.