The Moments are more intense if you’ve played enough tennis to understand the impossibility of what you just saw him do. We’ve all got our examples. Here is one. It’s the finals of the 2005 U.S. Open, Federer serving to Andre Agassi early in the fourth set. There’s a medium-long exchange of groundstrokes, one with the distinctive butterfly shape of today’s power-baseline game, Federer and Agassi yanking each other from side to side, each trying to set up the baseline winner...until ...