Liverpool fans need no reminding of the dominance Ferguson managed during his long stint at Old Trafford.
Ferguson’s reign corresponded with a disappointing run for Liverpool and he, of course, contributed to it in many ways.
But as we sit here today, it is Liverpool who are on top, a Champions League and Premier League title later.
The Reds are currently head and shoulders above United, and it doesn’t look as though that will be changing any time soon.
Jurgen Klopp has played a momentous part in that, and Ferguson recognised back in 2016 what the German was doing.
Speaking about his big concern back then, he said of Klopp and Liverpool: “He has done a really good job and revived Liverpool's enthusiasm.
"It can happen that big clubs lose it. For two decades, Liverpool changed managers without building their own identity.
"You can now well and truly sense that you have to count them in this year. You can see Klopp's dedication on the sideline, I'm convinced his work in training is similar.
"He's a strong personality. That's absolutely vital at a big club. I'm worried about him because the one thing United don't want is Liverpool to get above us."
That worry has come true, and it appears as though United have a long way to go before they find themselves in a better place than Klopp’s men, despite managing to finish above them last season.
The next big step towards that is hiring a new manager, something United arguably haven’t done consistently since the departure of Ferguson.
Even the interim appointment of Ralph Rangnick hasn’t gone particularly well, with relationships frosty around Old Trafford.
Things haven’t been perfect at Anfield this season, either, with Manchester City well on their way to the title, but Klopp and his men are in a much better situation as things stand, something United will desperately want to change over the coming years.