Being able to read your opponent’s body language during a game will give you an idea of how they’re thinking, and as a result, that will give you an advantage. Body language is very important. It’s a way of showing what’s going on in your head and how you are feeling. Let’s say you’re feeing tired during a game and you show it through your body language. What you’re telling your opponent is that you lack stamina and that you can’t keep playing at that pace. So if they’re sharp enough to catch that, their strategy will be to keep this pace and be in control of it or to increase the pace, leaving you far behind. Everyone gets tired. It doesn’t matter who they are or how much they train. But not showing that you’re tired (even though you are) will leave your opponent questioning themselves: “How long can they keep going?? Aren’t they tired?? How long can I keep going??” Imagine after a really long rally, let’s say more than 35 shots, you walk around like they just messed up on their serve, so comfortably.. they’ll be feeling like “What the!!!” That will definitely give you an advantage. Whenever you start feeling tired, trick your mind into believing that you’re actually full of energy. So just by jumping slightly before the rally starts or walking around with so much confidence, express all this through your body language. This will actually give you more energy. Lastly, remember that most people get tired not because they’re not physically fit, but because they have already mentally given up.