Every performance has a structure in the mind: what you see just before you perform, what you say to yourself, where in your body the feeling starts and in what order these happen. Your best and worst performances come from different structures. Athletes rarely notice the difference themselves, because they only see the end result.
I listen to how you talk about success and failure: your word choices, your tone of voice and how you move as you speak. From these an order starts to emerge in which things happen, and usually also the moment where the best and the worst performance go in different directions. I have practised this skill for more than 20 years, and it is my strongest area.
Then the change. Many athletes know exactly what they should think, and still the nerves rise at the same point every time. The reaction happens before you have time to think, so talking alone usually isn't enough to change it. I work where the reaction arises: in the unconscious mind, with a method that suits the issue, such as hypnosis. Always with the client's permission, and often without even needing to explain the structure.
Once the point is found, change can happen in a single session. That's why I also do single sessions at short notice. Longer coaching makes sense when the goal is a whole season or when the old habit runs deep.