frustration

In the evening I go to play tennis as usual. At that time, I am very exciting in my heart. I play with my friend. I can't do it very well. So my coach approaches to me, he ask me to practice with new members. This matter represents my progressive speed not to be able to follow everybody who simultaneously to join. I extremely feel bad in that flash. But I only can illuminate the training instruction to do. Before my diligentment completely wasted. It breaks my heart. I am really sad.