You will win some and you will lose some.
The key is to do your best, learn from each defeat and most importantly be consistent with who you are and what you want to become.
It is easy to react to a loss and become negative or forget your core.
If you are world class, or want to be world class, make sure everything you do is aligned to that belief or aspiration.
Your behavior, attitude, reactions and outlook need to reflect world class. Once you do that, the world will respond accordingly because you do not give any other choice.
So go out and turn every loss into a win by staying true to your foundation, beliefs and goals!