Aldridge has identified that the side could be light in the full-back areas going into a very busy period of fixtures, and wrote in his Liverpool Echo column that he is slightly concerned about the responsibility placed upon both Nathaniel Clyne and Alberto Moreno.
When discussing selection options for Wednesday's League Cup tie away to Southampton, Aldridge said: "The full backs have played a lot of games. There's a bit of a problem in that area, especially with Nathaniel Clyne now one yellow card away from a suspension.
"I'm not sure what the Plan B would be if he or Moreno gets an injury, we don't have a lot of alternatives, but this is probably not the time to be worrying about that! Let's just get the game won!"
Aldridge does raise a pressing issue, as there is no obvious alternative to the two full-backs. Connor Randall has been part of the first team squad for several games under Jurgen Klopp, and has played the one game this season - in the League Cup win over Bournemouth, with Nathaniel Clyne playing on the opposite flank.
This is perhaps one reason why the Reds will be glad to have Jon Flanagan back in training, so that when he's back to match fitness he can offer another option in that area during a busy time, in order to take the strain off Clyne and Moreno.
Jose Enrique has been getting some match practice under his belt playing for the Liverpool under-21's in Monday night's defeat to Manchester United, but failed to impress - though he was playing out of position at centre-back.
Klopp probably has enough faith in Randall to step in for one or two games, should anything happen to either Clyne or Moreno, but it is a lot to ask a player to deputise for a longer period of time given he only has the one senior appearance under his belt.