One of the things that can harm confidence in games is when players begin to think too much about technique right before and during a match or competition.
Some coaches argue that if players don't think about technique, they won't play well. However, if athletes focus on technique, they will do that technique well, but their overall game will suffer because they are not thinking about going full out and playing aggressively.
There is a time and a place for technique. That time is during training. It is here that athletes can question and analyze their game and focus on a particular part of their skills to develop them. By doing this, the new technique becomes, with practice, second nature and it will then help your athletes to play better when it really counts.
When it's game time, athletes shouldn't question, doubt, analyze, or get technical. Simply put, athletes must trust their abilities and go with the flow.