Darren Fletcher is certain Liverpool will not come to Old Trafford with the same safety-first attitude Rangers used to such smothering effect earlier this week.
The battles between the north-west giants are always highlights in the Premier League fixture calendar no matter what their respective positions in the league. That Liverpool have now gone 20 years without a title and are trying to rebuild under Roy Hodgson has not lessened United's desire for victory.
"Liverpool's history will not allow them to put nine men behind the ball," he said, reflecting on how Rangers were so successful in stifling United in their goalless draw on Tuesday.
"That is not their style. Under Roy Hodgson I am sure they will be disciplined and well drilled. But they will look to win the match as well."
In making 10 changes to his starting line-up in midweek, Ferguson seemed to be emphasising the importance of Sunday's clash.
He quickly learned the importance of beating Liverpool at the start of his staggering 24-year reign at Old Trafford.
And while United's success has left their fellow north-west giants in the shade over the past two decades, they remain a foe to be beaten with relish.
"It is the biggest game because of the history and the success the two clubs have had," reflected Fletcher.
"We have had a lot of battles over the years. There is a great history between the two clubs and we have equalled their number of league titles now, so a lot is looked into that.
"It is a massive occasion, when form goes out of the window. Liverpool will be looking to kick-start their season but to have them at Old Trafford so early just emphasises the importance of getting the right result."