To enter, you'll have to follow Microsoft UK on Twitter, and send a 140-character missive explaining why you deserve to go head-to-head against the pair of gold medalists. You also have to send in a picture of you and your family playing (or pretending to play) the game, which seems kind of unfair. Christie and Lewis-Francis could totally use that image to learn your techniques, giving them an unfair advantage in the final showdown. Maybe a smaller advantage than their natural, immeasurable athletic prowess, but an advantage nonetheless.
Microsoft Xbox One