"If losing is equated with failure, the battle of confidence cannot be won. Your motto should always be, "Win or lose, another step foward" You can find success in a losing effort when you establish clear performance goals prior to the match. You have the potential to learn much more from a loss than a victory. When you set your goals properly, your confidence can grow, independent of your matches outcome."
James Loehr --- The Mental Game: Winning at Pressure Tennis