In fact, only once in the 21st century have they previously done so – in 2009, the year of Rafa Benitez’s ‘FACT!’ rant and Fernando Torres roasting Nemanja Vidic at Old Trafford, but United still edging out their most bitter rivals.
That is what makes today’s Anfield showdown such a monumental occasion.
Even without the usual soundtrack of fear, loathing and pure hatred which usually accompanies it, this is a red-letter fixture of rare importance.
While Manchester City remain bookies’ favourites and Leicester refuse to fall away, this is still a proper six-pointer, the acid match of an intriguing season.
With Liverpool faltering and United resurgent, Ole Gunnar Solskjaer’s men can not only open up a six-point lead over the champions, they can signal a shift in the balance of power between England’s two most historically successful clubs.
