Answer:
Lovely and round I shine with pale light grown in the darkness a lady's delight.
You do not want me when you donβt have me but when you have me you don't want to lose me.
A sport with love and service played by singles and pairs.
What can be as big as an elephant but weighs nothing?
If you've got me I'm everywhere. If you share me I'm nowhere. What am I?
Whoever made me don't want me. Whoever bought me don't need me. Whoever use me don't know me.