any idea if it mentioned about the switch from eastern to semi western/western as for the appearance of more "athleticism?"
Scroll down to "Extreme Topspin" in bold.
"Itís the width of the face thatís vital. A wider face means thereís more total string area, which means the sweet spotís bigger. With a composite racket, you donít have to meet the ball in the precise geometric center of the strings in order to generate good pace. Nor must you be spot-on to generate topspin, a spin that (recall) requires a tilted face and upwardly curved stroke, brushing over the ball rather than hitting flat through it"
"itís common now to see male pros pulled up off the ground and halfway around in the air by the force of their strokes, which in the old days was something one saw only in Jimmy Connors."
"the classic advantage of volleying was that you could hit angles that would go way wide if attempted from the baseline or midcourt. But topspin on a groundstroke, if itís really extreme, can bring the ball down fast and shallow enough to exploit many of these same angles."
"The generic power-baseline game is not boring ó certainly not compared with the two-second points of old-time serve-and-volley or the moon-ball tedium of classic baseline attrition. But it is somewhat static and limited; it is not, as pundits have publicly feared for years, the evolutionary endpoint of tennis."
--David Foster Wallace