It appeared at one stage as if the Reds would ease their way into that tie, with Brendan Rodgers able to rest key men ahead of an eagerly-anticipated encounter at Anfield.
Liverpool were, however, to make hard work of League One outfit Notts County in the Capital One Cup - throwing away a two-goal lead before eventually prevailing 4-2.
It took 120 minutes for them to dispose of the Magpies, and untimely injuries have been picked up by Aly Cissokho, Joe Allen and Kolo Toure.
Liverpool skipper Gerrard said in the Daily Mirror of the cup struggles: "That wasn't what we wanted. We're going away slightly disappointed.
"Yeah, we're in the draw and we're in the hat and obviously pleased to be through, but it was exactly what we didn't want really. One hundred and twenty minutes and a lot of players who are going to be starting on Sunday have played too much football.
"There's no doubt about it, extra-time, playing that amount of minutes, is a bit of a blow to us.
"I think the game plan was to get the game won, done and dusted, and then try and rest a few for Sunday."
On the knocks picked up by the likes of Toure, who has been a rock at the heart of Rodgers' back four as Liverpool have opened the new season with back-to-back victories in the league, Gerrard added: "Maybe he wouldn't have suffered that injury if it'd finished after 90 minutes, so we have ourselves to blame for his injury.
"We all have to take responsibility for that, but fingers crossed it's not too bad. We've got an international break coming up as well so hopefully he won't miss too many games."