The Emirates Stadium was a sea of anxiety. Arsenal fans are acutely aware that a first Premier League title since 2004 is within their grasp and when it is so tantalising, it will be fraught. Especially when matches such as this become a grind. When the attacking patterns do not work. When the team look vulnerable.

Arsenal could feel their nearest rivals, Manchester City and Aston Villa, on their backs. Both had won to cut their lead at the top to four points. Mikel Arteta’s team had drawn their previous two league matches 0-0 – against Liverpool and Nottingham Forest. They were desperate for something here and when Patrick Dorgu put Manchester United 2-1 up with a scorching drive early in the second half, they would have taken anything. They would end with nothing – apart from a thumping headache.