Midfield
Fabinho
He will play at the base of midfield, whether in a 4-2-3-1 or a 4-3-3. He has settled well into the side, & performed reasonably well against Manchester United. Liverpool would need more of him driving forward with the ball.
Naby Keita
He did not play last time out vs Manchester United, but with Roberto Firmino a doubt for the game, he might just get picked over Jordan Henderson, given his attacking instinct, as well as Fabinho & Gini Wijnaldum being almost untouchables in the playing XI.
Gini Wijnaldum
No one can really say anything about his chances of selection, he is the automatic choice when it comes to midfield. He has been very consistent this year both at home & away. He could play at the base of midfield or get forward with Fabhino in the side.