Liverpool legend Jamie Carragher has identified three players he believes manager Jurgen Klopp should target in the summer.
Liverpool lost 4-1 at Anfield to top of the table Manchester City on Sunday.
The result leaves Klopp's side in fourth place in the Premier League, and are all but out of the title race already.
And Carragher thinks the German should recruit a forward, midfielder and defender when the transfer window re-opens.
"Initially, when Jurgen Klopp came in, Liverpool were a team who were sixth or seventh," Carragher said on Monday Night Football on Sky Sports.
"His first summer he brought in three players - Joel Matip, Georginio Wijnaldum, and Sadio Mane. That then took them into the Champions League.
"Over the next 12 months he then brought in Mohamed Salah in the summer, Virgil van Dijk in the January and Alisson on the back of the 2018 Champions League final. That then took them on again, to the Champions League win and the title.
"I think Liverpool are back at that stage where they need those three players to come in again to give them that jolt."
He added: "People say, 'Well, Jurgen doesn't rotate'. Liverpool haven't got the quality of squad and back up of other clubs. Liverpool wouldn't have won the trophies they have done over the last two or three years if he'd rotated.
"I still think they will be back - but they need three players.
"They need a centre-back - maybe he's joined now in Ozan Kabak - they need someone to replace Wijnaldum, and they need someone in the front three.
"And I'm not talking about players on the bench. I'm talking about players to come into the team like Matip, Wijnaldum, and Mane did, like Salah, Van Dijk, and Alisson. That's what Liverpool need."
