I love getting some exercise and playing tennis. Do you have a favorite sport?
Tennis is also my favorite sport. Do you like to play singles or teams of two?
I like to play teams of two! It's a lot more social and adds a nice dynamic to the game. How about you?
Depends on my mood. If it's casual I like teams. But if I'm pushing my self I prefer to play one on one. 
Cool. Have you ever played squash? It's pretty similar to tennis.
Is that where you play with four people total and a little rubber ball? 
You don't need 4 people.. you can play singles also, but yes! It's with a hard rubber ball. It can be quite fun! Although tennis is definitely my favorite. 
I'd love to try it some times. Is it an Olympic sport like tennis?