The dilemma appears deceptively simple. part of being number one is being stubborn, possibly excessively. However, his forehand hasn't clicked all year and now he's losing his serve. Should he keep hitting his forehand without adjusting it? Or should he start changing pace, and angle. Instead of going for that down the line shot perhaps he should opt to go for that cross court shot... Same can be said about his serve.. Should he start adjust his stance, toss, and motion?