Last chance for us to prevent them surpassing our league tally, he says
The two sides have already met twice this season - in the Premier League and the FA Cup at Old Trafford - with Sir Alex Ferguson's charges winning both clashes.
Now the ex-Red believes that the game on Sunday will prove to be the perfect time for the Merseyside outfit to shed the disappointment of the recent loss to West Ham.
"Despite Sunday’s defeat, I’m positive about facing United," Aldridge said in a column for the Liverpool Echo.
"They aren’t invincible and we’re a better side now than we were in those two previous meetings this season.
"It’s the perfect game to bounce back and banish the memory of what happened at Upton Park.
"It would hurt a lot if they beat us for a third time this season and we certainly owe them one."
Aldridge also acknowledged that this would be the Reds' last chance to try and prevent United from winning a record 19th league title, as the two clubs are locked at 18 each.
"This is our chance to seriously dent their chances of securing a 19th league title," he said. "We don’t want them to overtake us and that should be a massive incentive for everyone. Sunday’s game is the only thing we can do about that.
"It’s one of our biggest matches of the season and it’s a game every player should be desperate to play in."