Don't ask yourself what you did wrong; ask yourself what you did right.
The substitute that thinks his place below him, will certainly be below his place.
There are two basic situations in volleyball - either you got the ball or you don't.
The sport of volleyball will never give you something that you can't handle; whether you do handle it is another question.
Focus on winning the contest with yourself.
There is nothing less important in life than the score after one game of a two out of three game match.