Former Liverpool midfielder Dietmar Hamann reckons Jurgen Klopp's Reds need to strengthen this summer in order to challenge for the Premier League next season.
The Merseyside club sealed a Champions League spot last season, finishing fourth in the Premier League table and have already spent £34m to sign Mohamed Salah from Serie A club Roma.
"I think they need at least two or three because there are still areas of the team that need addressing," Hamann told Sky Sports News HQ.
"If you look at the left-back position, I do not think that they should be going into the season with Milner at left-back. He has been a tremendous player for (Man) City and Liverpool, but he is not a left-back, so I think the left-back position has to be addressed."
The German also revealed he would like to see Klopp sign four more players.
"Maybe a centre back and then I think central midfield, because other teams have been better equipped in central midfield," he said. "So I would like to see another three or four players come into the club.
"Salah is a good signing, but at the same time that is probably where Liverpool are strongest - the creative department - with [Sadio] Mane, [Philippe] Coutinho, [Adam] Lallana and [Roberto] Firmino.
"So I think we need at least another three or four players."