 So much of tennis is about recovering from those lost points, which, as Federer points out, happens almost half the time, 50 to 100 times in a single match. And if you do let yourself get distracted by that, then you might not have the same success rate. And because the margins are so small, that might be enough to turn the match against you. So it is a humble brag, but it's also just a true statement about the nature of the sport. Our thanks to Jeff Sackman.