Also assuming you are a tennis player...if you do not study your opponents' shots during warm up, you are doing it wrong. The way the would play against a left

Also assuming you are a tennis player...if you do not study your opponents' shots during warm up, you are doing it wrong. The way the would play against a lefty is different than a righty. Someone with lots of topspin vs someone who hits flat, a pusher vs power hitter, etc.