I submit that tennis is the most beautiful sport there is and also the most demanding. It requires body control, hand-eye coordination, quickness, flat-out speed, endurance, and that weird mix of caution and abandon we call courage. It also requires smarts. Just one single shot in one exchange in one point of a high-level match is a nightmare of mechanical variables.
Beauty is not the goal of competitive sports, but high-level sports are a prime venue for the expression of human beauty.
I submit that tennis is the most beautiful sport there is, and also the most demanding....Basketball comes close, but it's a team sport and lacks tennis's primal mano a mano intensity. Boxing might come close- at least at the lighter weight divisions- but the actual physical damage the fighters inflict on each other makes it too concretely brutal to be really beautiful- a level of abstraction and formality (i.e., play) is necessary for a sport to possess true metaphysical beauty (in my opinion).
One answer to why public interest in men's tennis has been on the wane in recent years is an essential and unpretty thugishness about the power-baseline style that's become dominant on the tour. Watch Agassi closely sometime...he's amazingly absent of finesse, with movements that look more like a heavy-metal musician's than an athlete's...what a top PBer really resembles is film of the old Soviet Union putting down a rebellion. It's awesome, but brutally so, with a grinding, faceless quality about its power that renders that power curiously dull and empty.
John McEnroe...was arguably the best serve-and-volley man of all time, but then McEnroe was an exception to pretty much every predictive norm there was. At his peak (say 1980 to 1984), he was the greatest tennis player who ever lived-the most talented, the most beautiful, the most tormented: a genius. For me, watching McEnroe don a blue polyester blazer and do stiff lame truistic color commentary for TV is like watching Faulkner do a Gap ad.
I perhaps could have been somewhat better. One of the interesting things about playing competitive sports as a child is that you confront your own limitations rather starkly at a certain point.