Aldridge seems concerned about Liverpool's ability from set pieces at both ends of the field.
Set-pieces appear to have been a problem for the Reds so far this season having conceded a winner to Crystal Palace prior to the international break from such a situation, as well as other goals this season prior to Jurgen Klopp's arrival as manager.
In his Liverpool Echo column, Aldridge wrote: "It's so frustrating when you lose points against a team you know you should be beating. And when the dropped points come because of avoidable goals, it's even more galling.
"That's why I think set pieces will top of the agenda at Melwood this week. Scott Dann's winner for Palace and Russell Martin's equaliser for Norwich were eerily similar, and this is a problem Liverpool simply have to eradicate.
"The likes of Vincent Kompany and Nicolas Otamendi are a big threat at corners, and City will surely look to exploit Liverpool's known weakness in that area. Hopefully they will have worked on the issue on the training ground this week."
It wasn't just at in their own area where Aldridge hopes the Reds have been working on their set-pieces, as he added: "And hopefully, also, they will have taught one of the players – just one! - to have taken a decent corner themselves! How long are we going to have to wait for a decent delivery?!"
Both Kompany and Otamendi have shown how much of a threat they can be from set pieces, so it is of little surprised that there is concern over Liverpool's capabilities to deal with them at the back.
But one the thing that did go unnoticed from their defeat to Crystal Palace is that Jordon Ibe seemed to put in a few good deliveries into the box, as opposed to the rest of the team who are seemingly unable to get a cross past the first man.
Liverpool have only managed to score more than one goal on two occasions this season so they can't afford to be complacent at the back and give away a sloppy set-piece goal, especially against a side who currently top the Premier League and, as Aldridge mentions, are a mighty threat from set-pieces.
It is going to be a difficult evening for Liverpool on Saturday, and they certainly don't need to make it any more difficult for themselves.