In sports, there is so much external pressure coming from family, coaches, your team, and ultimately yourself (at any scale). In order to approach that pressure properly and allow yourself to remain in control of the outcome, one must avoid negative thoughts.
For an athlete, there is nothing worse than the stunting fear of failure. But- it is purely human nature to feel the fear of failure. Overcoming this and breaking down that barrier is what makes some of the world’s most outstanding athletes great.