Tennis is a sport played with rackets! 
Do you play yourself?
No, but I really like rackets. They haven't changed much
I play a bit but i am not very good.  I prefer squash.  Do you know when tennis was invented? I imagine it is an old game.
It originated in the 19th century in England as lawn tennis. 
Wow there you go now so it has been around for a couple of hundred years! Do you watch any of the big tournaments like the us open or wimbledon?
I used to watch Venus Williams as a child, one of the greats. Do you have any favorite players?
I like nadal. I watch him sometimes when i get a chance.  I like djokovic too but I dont think he is doing as well this year.
Nadal seems to be more popular, but Djokovic actually leads between them 26-24!
Oh i didnt realise that.  My tennis knowledge clearly isnt too good.  I do know that the williams sisters are very impressive. When they are on form some of their matches are brilliant to watch.