The modern U.S. Open tennis player is a master of racquet minutiae. In pursuit of the tiniest advantage, tennis stars tinker with their racquet's weight, balance, string properties and handle size.

DELRAY BEACH, Fla. — You can get everything you want these days with an on-demand subscription: music, movies, food, drinks, clothing. Now you can add freshly strung racquets to the list. Stringbox is ...

Professional tennis players call it “the Luxilon shot,” and, apparently, you can hear it coming. The ball crosses the net hissing and spitting like some enraged tropical insect. Its most lethal ...