Coaching decisions are base by you the client who is the player. When preparing for challenges only you can make that decision. Some players levels seems to be positive but there results are not improving. Player's not returning Serve's at a fast pace, or the ranking are dropping. My advice is to add a Tennis Consultant such as myself to your team. Your mentally energy needs to change one way or the other half is you need that positive energy, that is going to help you. If you purchase a copy hold on to it, i;ll sign if play Doubles