网球场上的挑战来自对手,而更大的挑战则来自场外,优秀的运动员必须有战胜来自场外挑战的能力。因为只有战胜了来自场外的张牙舞爪的挑战,你才能有机会继续战斗;也因为你能战胜场外的挑战,当你再次回到球场的时候,你会发现来自对手的挑战和困难是那样微不足道。所以教练必须给运动员讲一门被称为意志训练的课程,而教材就是每天清晨醒来后要面对的现实生活。 Challenges on the tennis court come from rivals, while bigger challenges come off the court, and good players must have the ability to beat off-court challenges. Because you only have the chance to continue fighting if you overcome the challenge from the off-court claws, and because you can overcome off-court challenges, you’ll find the challenges and difficulties from your opponent as insignificant as you return to the court . Therefore, the coach must give the athlete a lesson called a will-training course, and the textbook is the real life to face after waking up every morning.