Fear not: You don't have to be some sort of fancy-type with tennis courts and manicured grounds to play this soccer variation. You can most certainly set up the net with, say, a low-slung badminton net, a rope tied between two chairs or even a piece of lumber propped on two rocks. In other words, don't worry if your backyard doesn't look like the Kennedy compound.
Just like in tennis, you could play either singles or doubles. And the game pretty much follows general tennis rules. "Serve" (kick) the ball over the net, and the other team must volley it back in only one bounce and two touches. A point is scored by the server when the opposing team fails to return the ball legally.
For a harder version, make it a rule that you must volley the ball every time, meaning it can't bounce at all and only one touch is allowed per side. Soon, you'll run yourself ragged -- and will perhaps be a little quicker on your feet for your next game on the field.