At Old Trafford on Monday evening, Manchester United’s attack will be led by Mason Greenwood, a teenager still too young to buy a beer or get a tattoo.



For Greenwood, a fixture against Arsenal must be a curious event. He may have seen the YouTube clips and manager Ole Gunnar Solskjaer may soliloquise but the 17-year-old is part of a generation who did not see, hear and feel first-hand the Premier League’s most engrossing rivalry.



He was barely seven months old when Sylvain Wiltord’s goal sealed the Premier League title for Arsenal at Old Trafford in 2002. Greenwood approached his second birthday when Martin Keown monstered Ruud van Nistelrooy. He may have moved onto the potty as a mozzarella missile and a carton of soup drenched Sir Alex Ferguson’s suit in the Old Trafford tunnel.



This time around, it is United against Arsenal but not as we know it. In truth, it has not been like the old days for some time now. For a while, as Arsenal...