Pressure is the stress built during a game and it can impact your performance towards the game. The pressure can be a positive thing since it will allow your body to move with your mind to play without fail in your mood, however gaining to much pressure can built your stress and worries to great heights which can cause your mentality to think negatively and puts a limit to your body to perform poorly and inaccurately till your thoughts starts to hate how you performed and how you can never do great ever again, but if you keep your cool and mentally be positive.
