A button to click on (ACCEPT or DECLINE) when challenged to a duel

When we get an email telling us that someone has challenged us, we are then taken to the 'duel' page, where we are then taken to the story for which we are being challenged. At THIS point, is where we need some type of button for us to either ACCEPT or DECLINE the challenge. Then that person would get an email with our response. The way it is now is if I decide to submit a draft for the challenged story (amidst other entries), neither one of us knows (A) if I've submitted/accepted the challenge, and (B) who has won (other than a brief blurb flashed at the top of any given page.

Sorry for the length :)