Positivity will win you the game. A positive image of yourself and a positive attitude is more likely to win you the game. Good behaviours like eating right and getting enough sleep increase your probability of winning.
Your level of performance is significantly affected by your mind set. Remember the zone.
Of course a large amount of focus is needed and commitment. You may find yourself to the point of nausea trying to reach that goal.
It's important to know your limits in ANY SPORT.
The body is a physical capsule and has its own limitations. It is very important you listen to your body and rest when needed. I know the mind wants to go on, go faster, go longer and stronger, but the body needs training.