Consider the tennis ball. The small neon orb is so ingenious in its design that it simultaneously inhabits the highest levels of perhaps one of our most demanding sports, fits snugly on the legs of ...

Tennis has been called the game of inches, of kings, of poets, of love, of errors, of endurance, of a lifetime. But those are mostly metaphors. Really, tennis is the game of spin. Watch Novak Djokovic ...