With Manchester United facing Brighton at Old Trafford this weekend and Arsenal playing Chelsea at the Emirates, it is incredible to think that a top four finish that seemed almost impossible just three weeks ago would be in United’s own hands if both matches result in home wins. Such an outcome would put both United and Arsenal on 44 points, just three behind Chelsea, who come to Old Trafford on the Reds’ penultimate home game of the season. Of course,…