Answer:
A sport with love and service played by singles and pairs.
What is the edge of earth and bread?
What three letters change a boy into a man?
My voice is tender my waist is slender and I'm often invited to play. Yet wherever I go I must take my bow or else I have nothing to say.
You find me behind the stars; or in a sixth seventh or third. It takes something round a computer and me to make pie. I am bigger than anything you can think of.
It is something you make after you've weighed your options.