Don't Take That Shot ... This Time.

Sometimes it's best NOT to take pictures. Sports are exciting, but concentration is essential. I think exposing (no pun intended) a person who is nervous about their performance to significant photographic equipment and attention may not produce the results you are anticipating. Sometimes it takes an effort to conceal the camera and get the shot in a fashion that does not elevate the pressure on the subject in an already tense situation. Wait until they are more confident. Wait until they want to see pictures of themselves. Show them that you are not there to embarrass them, but to try to make them look as good as possible. If the time is not right ... wait. You'll have more opportunities.