I see genres as generating sets of rules or conventions that are only interesting when they are subverted or used to disguise the author's intent. My own way of doing this is to attempt a sort of whimsical alchemy, whereby seemingly incompatible genres are brought into unlikely partnerships.
Everyone who sits on a sofa watching 'Match of the Day' is a top soccer expert, as you know. So if you start to worry about such people reading your story and saying, 'That'd never happen' you're going to freeze up. You're writing fiction, and your characters can do whatever you need them to do.