Worry about what hasn't happened yet kills your performance. Michael Jordan's secret was staying locked in the present moment, where you can actually act. The past and future are distractions that limit your potential.
Chapters
If you watch Michael Jordan in The Last Dance, they ask him, hey Jordan, you ever worry about the shots making the game winner the next day? He's like, no, I'm not going to worry about a shot I haven't taken yet. He's just so present. One of the greatest gifts of Michael Jordan, why he was so good and so locked in, is he was so present to the moment. Okay, and you see that over and over and over. People that are in their best and locked in the zone, they are present to this moment because the present moment is the only moment you have to live. You can't live in the past and you can't live in the future.