Tommy Paul Is Helping Lead American Tennis Back to Glory

It’s so blue.” Tommy Paul is scanning the middle distance as we idle aboard a 36-foot Yellowfin boat about half a mile off the coast of Boca Raton, Florida. It’s late afternoon on an early April day, and the Atlantic—which is usually tinted a little darker and greener here—is gemstone radiant, as if the light is somehow coming from underneath it instead of high above.