Confidence is one of the keys to success. There are many sources of confidence, such as hard work, body language, past achievements, etc.
Try giving yourself a steady diet of positive thoughts and affirmations, throughout your day, and especially during competition. You get what you focus on, but unfortunately, most people focus on the negative, or what they don’t want to happen.
Here are some sample affirmations:
“I am a confident athlete who goes all-out, whether I feel like it or not, and inspires others to do the same.”
“When the pressure is greatest, I love competition the most.”