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.
Squash (sport)
Squash is a ball sport played by two (singles) or four players (doubles squash) in a four-walled court with a small, hollow rubber ball. The players alternate in striking the ball with their racquets onto the playable surfaces of the four walls of the court. The object of the game is to hit the ball in such a way that the opponent is not able to play a valid return. About 20 million people play squash regularly world-wide in over 185 countries.
are only two ways to begin a conversation: State a fact [or] ask a question/opinion". Accordingly, openers are often linked to props, e.g. "Do you have a cigarette?" "Wow, you're reading "Crime and Punishment", that's one of my favorite books..." "I like your skirt, where did you get it?" etc. Many venues, such as singles tennis events, etc. are geared toward prop-based conversation openers. Some people keep conversation