Do you like Tennis? It can be played one on one or between two teams, called doubles.
I haven't ever played.  Tell me more about it and maybe I might look into it.
Each player uses a racket that is strung with cord and they try to hit a hollow rubber ball covered in felt over a net into their opponents court.
Is it a very physically demanding sport?
I think so. The object is to hit the ball in such a way that the opponent is not able to return the ball over the net.
how many points does it take to win a game?
Sets are played and it takes six games per set 
Is there a certain number of points one must earn per set?