Racket technology has turned tennis into baseline whack-a-mole boredom. Pure athleticism (running, jumping, etc.) is 3/4 of the sport; skill only 1/4. Contrast this with the players 40+ years ago who made do with wooden or aluminum rackets and head sizes of 65 sq. in.
Watch Ken Rosewall and Tony Roche in the 1970 U.S. Open final. Nobody today can do what they did then. Link is below.