to volley in tennis you have to close your hands together if you where stretching your fingures
After someone wins.
anytime as long as you have hands...
Tennis was first played in France about 900 years ago - with people using the palms of their hands.
yes you can switch hands between tennis matches although its tricky.
It's perfectly acceptable to use both hands, either together or separately, in tennis. There are no rules proscribing the practice.
be able to keep your hands behind your back.
The idea of tennis was founded in the 12th century in which the players used hands instead of rackets. During the 16th century tennis players began using rackets.
It began 900 years ago in France as a sport that was played with the palms of your hands.
I believe the dumest game is Tennis the game were you smack each others hands until someone gives up because your hands burn.