It is difficult for young players to learn - because of the great emphasis on records - but, ideally, the joy and frustration of sport should come from the performance itself, not the score. While he is playing, the worst thing a player can think about in terms of concentration - and therefore of success - is losing. The next worst is winning.
John WoodenLosing is only temporary and not encompassing. You must simply study it, learn from it, and try hard not to lose the same way again. Then you must have the self-control to forget about it.
John Wooden