Answer:
We are five little objects of an everyday sort. You will find us all in a tennis court.
You throw away the outside, eat the inside, then throw away the inside. What is it?
As I walked along the path I saw something with four fingers and one thumb, but it was not flesh, fish, bone or fowl.
Stealthy as a shadow in the dead of night, cunning but affectionate if given a bite. Never owned but often loved. At my sport considered cruel, but that's because you never know me at all.
I have a hundred legs, but cannot stand. I have a long neck, but no head. I cannot see. I'm neat and tidy as can be.
If you can spot one of these eastern warriors, it means they're not doing their job right.