Andre Agassi said this quote

It's no accident, I think, that tennis uses the language of life. Advantage, service, fault, break, love, the basic elements of tennis are those of everyday existence, because every match is a life in miniature. Even the structure of tennis, the way the pieces fit inside one another like Russian nesting dolls, mimics the structure of our days. Points become games become sets become tournaments, and it's all so tightly connected that any point can become the turning point. It reminds me of the way seconds become minutes become hours, and any hour can be our finest. Or darkest. It's our choice.