text:  And mentally, it just makes his opponent think, double kind of just question everything and say, should I come to net? Should I serve a different way? And it really saps all of the confidence out of someone, even like Novak Djokovic, which was just, again, I can't emphasize enough how shocking it is to see, you know, Novak Djokovic shaking his head at a shot that he can't reach or just looking up at his player box and laughing.