i always thought its pure handles

as soon as your handles are sick, and you know they are from countless hours of just you and the ball, they get transferred to organised ball, where you feel that when you drop the ball its part of you

from there the whole match feels more in your favor, and slowly you stop feeling self-conscious and develop that feeling of 'flow'

basically everyone feels nervous in any sport until they make their skills autonomous, some it comes naturally some it doesn't