For me, I've always taken being on a set as my school, because I've been working since I was ten.
By a great man, however, we mean a man who, because of his spiritual gifts, his character, and other qualities, deserves to be called great and who as a result earns the power to influence others.
If you can react the same way to winning and losing, that's a big accomplishment. That quality is important because it stays with you the rest of your life, and there's going to be a life after tennis that's a lot longer than your tennis life.