Though you lose, learn to smile before your opponents and hence make it tough for them to believe that they have won over you. This is nothing against sportive spirit. Competetions keep happening in life and opponents keep coming. It's all about how you prepare yourself for the next clash and nothing much about what has happened for the moment.
Prepare yourself well. Give your best. Result does not always matter. Go for it. Keep smiling and hold back the sword behind it. One or the other day you will be proud of yourself for being so. Wait for it and believe strongly that it will be worth the wait.