And with Jurgen Klopp's side continuing to showcase their ineptitude in defending set-pieces as they opened the 2017/18 campaign with a 3-3 draw at Watford, the need to sign the Dutchman was underlined. You see the same thing year in, year out.
He has already got off the mark in a red shirt, complimenting the three goals he scored over pre-season with a 62nd minute strike against Real Madrid on his competitive debut.
That is the opinion of an angry Jamie Carragher, who was working as a pundit on the game at Vicarage Road.
He's also seen his fortunes with the Dutch national team change, despite enjoying some exemplary performances at Celtic, the Breda native global debut came in October 2015 and has to date played 12 times for Oranje.
"Whether it's zonal marking, the players he puts in certain positions, the positions of the full-backs in general play are far too high and wide for me, which gets centre-backs exposed".
He added at full-time: 'Liverpool lose the ball and their centre backs are exposed, even if you have Franco Baresi there you are going to get exposed. They're terrible defensively, one man won't change that.More news: Bigg Boss on Star Maa & Vijay captivate viewers
'If you want to challenge for the Premier League then you need to concede 30 or 35 goals, so they need to take 15 goals away.
"It's the setup of the manager, he's been here now 18 months: set-pieces are the worst in the league, conceded the most goals of the top six, there's still no change". You think, 'what are your weaknesses?' - set-pieces, getting done on the counter-attack. It's not just players making one mistake, the whole system looks wrong and set-pieces are a mess.
Redknapp also had his say on the Liverpool defending.
"The way Liverpool set up, set-piece-wise, they're always going to concede goals".
'I think those two (Lovren and Matip) are not good enough.
He calls him a "leader" who would organise the back four.
Stoke City, Burnley, Arsenal, West Ham United, Hull City, AFC Bournemouth, West Bromwich Albion, Swansea: these are all teams that came to Old Trafford last season and somehow left with a point, despite being dominated all game.