Usually, a team's place at the end of Boxing Day can indicate success, failure, improvements and items in need of repair. In Manchester City's case, all of these instances could be met with a mixture of results, questions and answers. Both positive and negative.
Fortunately this can be seen as a tune up before Tuesday -- and if played to expectation, it could turn out to be something like a training session. Sunderland have been completely inept this campaign and are losers of their last three league matches. The Black Cats have been providing their opponents with plenty of opportunities to score, as they've conceded 33 goals and 106 shots on target, both league highs.