Liverpool have opened the season with successive draws against Newcastle United and Nottingham Forest, conceding four times across those two fixtures.
Questions continue to be asked about the club's balance in midfield, while full-back pair Milos Kerkez and Jeremie Frimpong continue to underwhelm.
Neville believes full-back is a huge area of concern for Liverpool, who he believes have failed to adequately replace Trent Alexander-Arnold and Andy Robertson.
The transfer deadline for Premier League clubs is Tuesday night and Neville believes Iraola should be demanding additions if Liverpool are to overcome their early-season stutters.
“If they’re going to play a back four… Liverpool are going to concede a lot of goals”: Neville sounds alarm on full-backs and midfield
"What's the most bizarre is that they haven't signed a left-back and right-back, unless they're going to go to three at the back with the three big centre-backs that they've got," he told The Gary Neville podcast.
"If they're going to play a back four, and Kerkez and Frimpong are going to play full-backs, and they're not going to sign a holding midfield player, Liverpool are going to concede a lot of goals.
"The two goals on Saturday, the right-back's nowhere to be seen on the first one and on the second one, he lets the runner go from the throw-in when he should just mark him and run, go with him all the way. He's not got a natural instinct to know how to defend.
"We used to criticise Trent Alexander-Arnold for his defensive work… but he is a lot better as a defender than Frimpong and he used to contribute 15 to 20 assists a season and I don't think Frimpong will.
"So I'm not sure what's going on there in respect of the recruitment… but I think they're leaving Andoni Iraola well short. If I was him, I would be going in there and I'd be demanding something in the next 48 hours because it will cost him.
"If Liverpool added a defensive midfield player, a really good one, and two good full-backs, they would have a really good chance.
"But they're being undermined by a lack of recruitment in those full-back areas, and in central midfield, they need to do something."
NevilleIraolaLiverpool’sGary NevilleAndoni IraolaLiverpoolNewcastle UnitedNottingham ForestQuestionsMilos KerkezJeremie FrimpongTrent Alexander
AIPROPX is an independent multi-source news index — we track, compare, and connect coverage from across the web into one place you won't find anywhere else.
