Listen carefully and you might just hear the sound of an old rivalry stirring. On Sunday there is unlikely to be pizza in the Emirates Stadium tunnel and, even if a penalty is missed, the chances of a bawling match between taker and miscreant appear remote. But Arsenal and Manchester United meet amid a clear sense things are changing: in recent years any excitement around this fixture has leant squarely on its tradition but, at long last, it takes on a life of its own once again.
This is not a title showdown: any suggestion the race for top spot might develop into a shootout between these…
