Until Death do We Part

I don't really have a huge idea for this story, but I thought it might form an interesting plot line. (Also I will be changing the description once I start it, by the way) Anyways, this story basically follows the lives of two people in a dystopia. Each year, there are two people randomly selected to take part in a tournament where they will be chained to the other person until one of the people is killed. Then, they will go on to battle the winners from the rest of the countries.