#3 Jamal Lewis
Andy Robertson is one of the best left-backs in the world and his absence, on occasion, does impact Liverpool. As such, left-back is one position that Jurgen Klopp will be hoping to strengthen in order to provide cover for Robertson.
Several members of the Norwich City side impressed individually though the team had a terrible outing in the Premier League. Jamal Lewis, the Canaries' left-back, can mirror Robertson's qualities and ought to be happy to kick on in the Premier League should Liverpool offer him the opportunity.
Lewis has work to put in on the defensive side of the game but he is now well-versed with the pressures of the top flight and will be a good deputy to the Scotsman. At 22-years-old, he has a lot of time before he peaks and Liverpool should be able to land him for cheap.
#2 Demarai Gray
Demarai Gray has been one of Leicester City's better players post the restart and has been around in the Premier League for quite a few seasons now. The Englishman can be a good alternative to both Mane and Salah and could flourish in the Liverpool setup.
Gray likes to run at defenders and has pace that could match that of the current Liverpool forwards. As such, he could be brought on to ensure the intensity up front does not drop towards the end of games and could also be a great cover for any of the front three.
Gray only started thrice for Leicester City in the Premier League last season, with 18 of his appearances coming from the bench. As such, he'd be happy to do the same at Liverpool for at least a year. He scored 2 goals and has 3 assists to his name this season.
Gray will definitely need to improve on his final product but he has been showing good signs of growth recently and won't cost Liverpool a lot of money either.
#1 Thiago Alcantara
Thiago Alcantara is now in the final 12 months of his contract with Bayern Munich, and it has been reported that the midfielder wants to leave with his ideal destination being Liverpool.
Liverpool's midfield, as good as they are, are a tad lacking on the creative front, and Thiago is exactly the player who can bring about a change in that. The deep-lying playmaker is an exceptional talent, with the ability to make things happen for the players in front of him.
Though he is 29, he still has several years left in his tank and given his reputation, he can bolster Liverpool's midfield and give them enough time to scout and find a long-term solution to their midfield woes.