At the start of the season Arsenal v Manchester United would have been the pick of tomorrow's Super Sunday showdowns in the English Premier League, but such has been the shift in the balance of power that the more significant match is Manchester City v Tottenham.
Both United and Arsenal have been overtaken in the table this season by their neighbours and, while Sir Alex Ferguson's team remain in the thick of the title battle, the Gunners have been cast so far adrift that they face a formidable battle to take up their usual place in the Champions League next season.
City and Tottenham have fought over the last Champions League spot in the past two seasons and their showdowns have been decisive in that respect. In 2009-10, Tottenham pipped City to fourth place after a late-season 1-0 win at the Etihad, but City gained revenge by the same scoreline at home last May to seal their entry to the Champions League.
City's superiority appeared to be confirmed early this season when they blew Tottenham away with a 5-1 win at White Hart Lane, but the distance between them has been narrowing since autumn turned to winter. Before missing the chance to draw level with City last weekend when they were held 1-1 at home by Wolves, Tottenham had the best record in the Premier League since the start of October.
Even now, with the gap between them at five points, there is barely anything to split the sides on recent form. City's 1-0 win at Wigan on Monday night took their points per game average to 2.33 since the start of October, only just ahead of Tottenham on 2.31.
United, by comparison, have averaged 2.13 points per game in that period. Arsenal's average is 1.93 - respectable but quite some distance from title-challenging form.